Well put.
Looking at the SLT of another lineage and criticizing the movements and angles can be a fools game (sorry, Argus ;-), especially when dealing with a practitioner who might have very deep and broad experience. At various times I have found myself thinking that the movements of a martial artist looked really bogus, only to eat my words when I actually touched hands with him.
The real special sauce of SLT isn't even the external elements of angles and such, but rather in the internal elements of tension, intention and the like.
These things are much harder to see and judge in person, let alone from a youtube video.
I don't know anything about Eddie Chong and his style, and yeah, that high wu sao sure looks goofy. But I wouldn't say that to his face until I touched his hands
Well, I partially agree.
Everyone's Wing Chun is different for sure. But I also feel that we can come to a pragmatic understanding of the art. It is, after all, based on certain concepts, principles, and physical structures. I've never bought the "just because a lineage does it's form this way means it's right" argument.
Far too many learn the forms without ever understanding them, I feel. I routinely cross reference the following student's forms and pick over them in minute details: Ip Man, Ip Ching, Wong Shun Leung, Tsui Shung Tin, Moy Yat. You'll learn a lot if you do this. If you watch their forms, you can discern their take on Wing Chun. Watch them do Chi-sau, and you'll notice the differences you noted in the forms come out.
Take my lineage, for example. One thing that tends to strike me about Ip Ching's forms is that he tends to be much more extended. You can see this in his forms as well as his Chisau. He has very good fa-jing, places greater emphasis on yiu-ma, and is overall more extended in many of his motions. This is reflected in his chisau, where you'll find a lot of lap-sau and fak-sau actions due to his extended nature. And this is reflected in his students as well -- in my teacher, and in myself, because that's how I was taught.
Now, by contrast, go look at WSL practicing his forms. His movements tend to be tighter, more compact, more square, and more structurally sound. Watch them practicing their Chisau, and you'll find the same thing: they tend to move their whole body in when they attack - to the point that they're reaching their opponent with a bent arm, and have very good control. You'll also see very good lat-sau-jik-chung. Their chisau tends to be simpler, more straight forward, and more geared towards combative application. Overall, they don't seem as soft as Ip Ching guys, though. Of course, this depends entirely on the instructor as well -- Gary Lam, for example, also has a Tai Chi background, and tends to have a softer and more varied approach.
I frequently questioned my instructor on why we do things as we do in our forms. I also frequently look at forms of other lineages, and listen to lectures given on them by Ip Ching, Wong Shun Leung, Tsui Shong Tin, Moy Yat, and the like. This is because I want a deep and broad understanding of the forms -- I don't just want one interpretation of them, because I believe that everyone's understanding is a little bit incomplete. Even among Ip Man's original students, each one carried away a bit of a different understanding, and each one missed out on certain knowledge -- things that they just picked up, but never really questioned or examined until later in life. And each one refined their Wing Chun, or innovated, in different ways, and with different approaches. There's almost always an angle to it, though -- no matter how good, individuals tend to emphasize certain things that "suit them" more than others, and this leads in a wide variety of approaches in Wing Chun. This does, however, mean that every teacher's WC tends to be a bit slanted, and a bit "incomplete." It's almost as if each teacher, and each lineage, has certain pieces of the puzzle that some others miss; yet they themselves also miss some pieces. That's why I seek a broader understanding. And, it's also why I think that forms are not always correct: a lot of teachers change their forms to suit their limited interpretation of a movement or concept. As we know, concepts in Wing Chun can be broadly applied, and sometimes, people take too specific an interpretation on something, and change it to suit that specific context without considering the whole picture. And sometimes, they never understood it, or just misinterpreted it from the get-go. Even the most experienced of us have some holes in our knowledge -- some things we just "picked up" but never fully understood.
So, I'll continue to be very discerning of forms. Being discerning, or even critical, doesn't mean that you can't keep an open mind, though. I just tend to keep my doubts until given a suitable explanation. But to be honest, most of the time I question someone on a wonky movement in a wonky form, I get a wonky answer that seems to miss the point and/or overlook the big picture.