Going to be studying Wing Tsun with a Grandmaster next semester!

[Vuk]

You know much martial artist and mixed martial artist history of Mr.Rutten? You are saying that run of a mil Wing Tsun practitioner would take out this guy with black belt in Taekwando,Karate, successful Thai and Kickboxer+ One of the legends in mixed martial arts scene. I doubt it could be done just like that. Otherwise i would expect that Wing Tsun practitioners would be dominating the MMA scene, which is not the case.

lol, yes, I do know his history. 5th Dan in Karate and 2nd Dan in TKD I believe. As I said though, it seems that he is relying more on force than technique. Look at his groin kicks for instance. They are outrageously slow (slower than the average TKDist where I study), barely chambered, he leans back when he does them, and he throws his guard down. I don't know how much (if any) is due to his injuries, but surely he could not throw his hands down at his sides. I don't know how good he used to be, but I am judging by his 'bar fighting' advice and technique.
And there is nothing 'run of the mill' about a WT practician. A practician is someone at master level who learns for themselves rather than to teach. It takes a LOT more to reach instructor level as a WTist than to get a black belt in most karate or TKD schools. (same can be said for most Chinese martial arts.
I never said that a WTist would beat him in MMA, I said in a bar fight. In the types of life or death scenarios that he is describing. If he used techniques like those, he would most certainly end up dead on the ground in a very short amount of time.

Even forgetting technique and just looking at speed, judging by a few videos of Rutten fighting that I have seen, he can get just about two punches a second into his opponent at his fastest. Any WT Practician would be able to get seven punches a second. Also, Rutten (even in his bar fighting video) loves to aim his punches at the face and the torso, while a Wing Tsunist would strike him in the throat...seven times each second. Also, a Wing Tsunist would coordinate his leg attacks with his arm attacks, something Rutten is unfamiliar with, so he would have to be defending against kicks the same time as punches.
Add technique in to speed, target, and strategy, and you have a no-win situation for Mr. Rutten. :P

EDIT: and even forgetting whether or not a skilled WT master could defeat Mr. Rutten, his techniques still do not work if you are not twice the size of your opponent! Therefore it is not good street fighting advice!