Hi Alan (You seem to have outed yourself in this thread.) 
Originally posted by Zhuge Liang
That is definitely true, but the point was whether or not skill in one art would carry over when you learn a new art.
Skill in some other MAs would not make one better at Wing Chun IMO, but if one is good at other MAs, then it might be a predictor of eventual Wing Chun capacity.
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If Ken and I were to both drop Wing Chun and take up Choy Li Fut…
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Funny how Tom wanted to talk about Leung Sheung, then changed the subject to Ken again.
This is justified though as Ken is a mirror of Leung Sheung training.
Since Ken spent over ten years studying with Leung Sheung, Ken is a font of information on the man. I enjoy hearing the anecdotes and Kuen Kuit ascribed to Leung Sheung from Ken as well as other LS’ students. Leung Sheung was a patient and kindly teacher from all I’ve heard. Obviously, he and Yip Man shared a very close relationship.
When Yip Man was asked to speak at many of the clan’s get-togethers, Yip would invariably hand the task to Leung Sheung, saying that LS could speak for him, which is representational of the closeness of approach of the two in the early HK years. If anyone wants support for this statement, Ken Chung, Jack Ling, and Siu Wong have all confirmed this.
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I have no doubt that he would still be able to kick my ass, using just Choy Li Fut.
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I have no doubt of it either.
But, there is no separating Wing Chun from the man. Ken brings to fighting his unmatched horse, positioning, sensitivity, and timing, all of which he teaches us. Sadly, there are no shortcuts. 
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Following the same line of reasoning, Leung Sheung with his level of skill in Choy Li Fut and Dragon style, would probably do better when learning Wing Chun in comparison with someone with no prior martial arts experience. Although this is of course not neccessarily true for all people.
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I think that other Kung Fu styles would have to be unlearned, old habits die hard. Again though, by proven athletic and mental prowess shown in other arts, this could predict success over time in Wing Chun Kuen. I don’t think that the other arts mattered in the long run. Many attributes of other styles are a hindrance to learning Wing Chun.
David, I look forward with anticipation for your further posts regarding our Sigung’s teacher, Leung Sheung. 
One last point is that while we (Ken’s students) know Leung Sheung through our teacher, Leung Sheung’s own greatness was the result of Yip Man’s tutelage. Any tribute to Leung Sheung should include acknowledgement of the debt we owe to Yip. Obviously, though, Yip Man was a very complicated person and diffident teacher, who shared his unmatched Wing Chun knowledge only reluctantly with most of his students.
Regards,