Okie dokie; Well first off this guy actually has a few valid points...
The reason we get our *** kicked so bad and only can "beat up" people in our own system is because we don't train hard enough; and In my educated opinion, because most WT/WC instructors are so full of themselves thinking that wing tsun is unbeatable... It has nothing to do with a "Full/Complete System"... Matter of fact; Yip Man did teach differences in his system. When He was teaching in Fo'Shan he was teaching more of the Chan Wah Shun stuff, with some Leung Bik mixed in; But when he moved to Hong Kong; He was teaching his system that HE MADE UP. Just like every other human being on the planet; He liked certain techniques and he taught worked for him. Ya he taught the other stuff, but don't anyone sit there and tell me he didn't have favorite techniques. It is well known that he had no interest in teaching.
When WT was developed (as we suppose) it was not built to be an "Unbeatable System", it was meant as way of people being able to defend themselves effectively in a short amount of time. So all you WT/WC people saying that WT/WC is unbeatable/only effective art is rediculous. But thats not to say WT doesn't have some really good concepts and theories. But we have to be able to adapt. The "Original System" is not going to be effective against EVERY fighter. You need to update applications or even create new techniques/modify old ones to do the job at hand.
The problem with creating new techniques is often people don't know how to do it. First off you need to UNDERSTAND the concepts and theories. How, when, why the technique is used; and how we adapt it to the new cutting edge stuff against new fighters/systems.
Our only saving grace is chi-sau/lat-sau. The more we train our reflexes in chi-sau and lat-sau; undeniably the better martial artists and fighters we will be.
As for this guy saying that only a few people learned the "one true system" well who the fart cares? I've seen what william cheung calls "traditional WC", and his "Dim-Mak" techniques. Well my good sirs, i've only been doing WT for 10 years, but I also incorporate my practical fighting knowledge into my system. My boxing, karate, wrestling/grappling knowledge and techniques help me create what I call meat an potatoe WT.
Another thing I do is stick to the principals. For instance bong-sau is not supposed to be really high; Nor is it supposed very close to the body. All basic WT techniques go towards the opponents center. Pak-da's don't go to the side, you put pressure forward.
Everyone has a different way of doing things, but what really matters is the fighting application.