Thai, you're a practical to-the-point kind of guy and I like that
It has been done in practise because I've seen it and even done it once. Granted I can't provide evidence of this short of getting the poor sap who was on the receiving end to join this forum, but I don't think that's happening
Don't get me wrong, the boxer's punch is formulated to knock a guy out and there's plenty of footage to back that up. The thing is that there are a lot of WT students who don't care about how they throw a punch, they just want to look like Emin and throw 1 million/sec and it ends up looking like a slapfest rather than a chain of serious damaging punches. Those punches wouldn't hurt a fly, but one fully extended WT punch has enough power that it needs. It may not knock out a tougher guy in a single hit like one of tyson's hits, but it's not trying to either.