CD Lee
The secret is in differentiating between training formats and competing formats. Two very different things that often share a name. Sanshou the competition format is exactly what you said. Sanshou the training format is not. By kungfu I mean the classical martial arts of the chinese culture.
I’m not sure if that answers your question… seems like you understood my point though. 
Red
Yes, you have to differentiate between them. They can be (but sometimes are not) very different.
All of them are grappling. But not all grappling is submission grappling, nor groundfighting; and not all groundfighting is submission groundfighting.
Technically speaking, you’re right that these different things are extentions of one another. But this is in theory, and not within the bounds of a given art. This is an important distinction. It’s true that, in the whole of reality, the knowledge of submission is an extension (although, of course, it has all sorts of it’s own knowledge) of the knowledge of basic grappling (as I’ve defined the terms). But that doesn’t mean that that is the case for any given art. For instance, some arts may choose, for the sake of tactical preference, or efficiency of training time, never to make that leap.
For example, greco-roman wrestlers spend alot of time training ‘par terre’ methods (groundfighting), but it’s not submission groundfighting. For the most part, instead of going for a postural control which is a physical attack, they’re trying to flip or throw their opponent to expose his back to the ground. In terms of technique, training, and practical application and implication - this is alot different than a submission groundfighting approach you would see in judo or BJJ.
For a ‘standup’ grappling example, take leg jamming movements to your opponent’s outside, keeping your pelvis open to him (eg. http://www.judoinfo.com/images/nauta/kosogake.gif ). If you look at the middle picture, the opponent’s structure and balance are broken - judoka call this kuzushi. What’s the point of doing this? Because it impairs the strength, reactivity, and resiliency of your opponent. Judoka use this to throw/put their opponent on the ground and to attack the joints (submission grappling), as in the case here. The kuzushi is grappling, a joint attack would be submission grappling. Why not just throw someone to the ground or lock out their elbow without this kuzushi? It doesn’t work - just watch a judo match on TV to get a lesson on this. ;p But you don’t have to go from kuzushi to a throw or submission. You can go to a bodylock which does not harm the opponent, but denies him movement (you see this alot, again, in greco roman wrestling). You can also strike. Take the middle picture of that koso gake again, and instead of continuing the movements to the third picture, have the ‘judokas’ elbow thump into the opponent’s mastoid a split-second after kuzushi is established (the arm position to do this would be a bit different, but the principle is the same). This is a common technique in baguazhang. Is it grappling? Definitely. Is it submission grappling? Nope.
ShaolinTiger
“It is not boxing, wrestling and muay thai. It is sanshou and it contains all these elements. It is not a merger of 3 arts. Understood?.”
No, actually. Are you just arguing semantics? By which I mean, I might choose to call this drink a screwdriver, but that doesn’t change the fact that it’s orange juice and vodka.
Or, are you making the mistake of believing that boxing, wrestling, and muay thai refer to any techniques executed during the appropriate ‘ranges’ of a martial engagement; and thus, since you punch, you’re a boxer; and since you takedown you’re a wrestler, and so on. If this is the mistake you’re making, you’re at least consistent, since it’s again due to confounding training formats with competition formats.
What do I mean by this? By ‘confound’ I mean that a term has two or more meanings, and that you switch sporadically between the meanings in your argument, and it is this reason that your argument is incorrect. For example, in this case here, wrestling, boxing, and muay thai (like sanshou) can all refer to two different things: certain training formats and certain competition formats. To elaborate since you still don’t seem to understand what I mean - I can train for three years in a northern preying mantis school, then enter a muay thai competition and say I’m doing muay thai. You can train in muay thai for three years and never enter a competition and say you are doing muay thai. Even though we are both using the same words, we are meaning very different things. This is exactly what I mean, and exactly what you’ve been confounding. Continuing with the above example, you say that sanshou contains all of boxing, wrestling, and muay thai. By this, you must mean the competition formats of all these terms. But you have concluded from this that sanshou is therefore the standup art they were looking for all along; but here you are referring to training formats. You switched meanings, you confounded. This isn’t just a logic lesson. If you had not confounded (ie. if you were logically consistent), you would have meant, ‘it is the standup competition format they have been looking for.’ But, although this is logically consistent, it isn’t true. They allready have the competition format they were looking for, and they like it better than sanshou. Not a logic lesson, but an explanation as to why I think your entire meaning, even broadly interpreted, is entirely incorrect.
“wushu used to mean kungfu but now it is is the term used to describe the sport. Same with san shou. San shou now is associated with the fighting sport. like it or not.”
I’m not sure why any of this was addressed to me, nor what relation it has to the passage it seems to respond to.
“10 years of Shaolin Longfist…and you are going to tell me what is and isn’t kungfu”
No, I’m going to tell you, exactly as I said, that if you’re doing muay thai + boxing + wrestling, then you’re not doing kungfu. I’m not sure where the ambiguity was, but I apologize for the confusion.
“San shou is the essence of kungfu…”
Again, not sure why this was addressed to me, nor what relation it has to anything I said.