Hey there Hardwork108
Let me qualify my answer by saying this, I dont do 5 Ancestor so I comment on it based on my experience with them, and some speculation
Compared to wingchun, it is hard
http://www.youtube.com/watch?v=lYSw0yUMZh8
I have been taught we would never be doing this. So when you see some Videos/Books like Randy Williams doing 3 star/ Sam Sing Blocking, its not the way. Sigung Yip Chun has said, the jong arms should never be used for bashing or hardening the forearms.
The hard soft theory is interesting. From my practice, Pakua to me is hard compared to taiji, Hsing i is harder than pakua, but coiling wise pakua is more sophiscated.
I believe the reason is wingchun is more widespread(thanks to guys like Bruce Lee, Yip Man, Yip Chun, Yip Ching, Wong Shun Leung, etc…too many great names),
As a side effect, the internal elements of wingchun are not taught, or people dont want to spend time to learn it. For internal practice, it takes a longer time, and faith in the Master. Internal training was always a closed door practice.
It helps to be able to read the kuen kuit and words(also because most chinese Sifus havent really learn english to any proficiency). Helps so you dont get pulled a fast one as well. I have found the protrayal of wingchun in China Forums very different from what is said in the western world.
Wingchun in the western world has largely become a physical practice, like boxing, muay thai etc… Not that it is wrong, just different, but still effective.
In the movie Yip Man, Donnie Yen says one thing, dont just talk about kuen kuit(just be able to quote) you must be able to hit the person.
That to me, is the function of Chi Sao, whether its white crane, wingchun, taiji or 5 ancestor.
Here’s a clip on internal wingchun
http://www.youtube.com/watch?v=z_lI2qM2i60
Its also not mainland versus hongkong that makes its more internal or external. Look at Masters Kenneth Chung, or Chu Shong Tin, or Wan Kam Leung
Hongkong wingchun is 90(?) of wingchun in the world, hence along the way, many could have left out the internal training, rushing to learn to teach for a living.
While mainland wingchun styles are still close knit, hence, less chances of MAC Wingchun happening. Even though, these years, I have noticed some trend towards that, and increasing politics from Sifus wanting to make a living.
Here’s a sharing from Sifu Wong Nim Yi, Mai Gei Wong School in Guangzhou China on the 12 Fatt.
12
And the 12 Fatt are