Asian MMA fighter here to weigh in...
First off, though I'm not remotely offended by OP, Osmium is right that there is some racism involved here. He even dropped a definition as evidence. Not all racism is as blatantly malicious as "____ people are superior and _____ people are inferior."
Anyways, whatever, we're all a little bit racist. Moving on...
I agree that Asian MMA fighters have been largely lackluster. I honestly believe that it is a cultural thing more than a genetic thing. As others have mentioned, Asians (in Asia) are at a disadvantage in terms of technology. No, not like PS3 and shit -- I'm talking about training methodologies, weight cutting, etc. They don't have wrestling over there, they don't employ the cage as much, their striking is at a considerably lower level, and athletic training isn't taken as seriously.
In Japan, a lot of big fighters still have full-time jobs. They're not even training full-time, as a big-league MMA fighter in most other places would.
And did I mention the thing about wrestling and cage work? Seriously, that ish is important, and since they don't have an abundance of either of those things, a fighter could work his way up to the top of the local heap without being skilled at either of the SUPER IMPORTANT aforementioned skill sets. That's a recipe for mediocrity, if I ever saw one.
To make matters worse, for whatever reason, the level of striking from Asian MMA fighters is pretty low. It's ironic since K1 is a big thing over there. I have no idea how that happened. In any case, it certainly is a factor. I honestly don't think that Asians have inherently weak chins, but I do think that their inferior striking contributes to their tendency to get KO'd.
(PS: the exception to this are Southeast Asians in Muay Thai, Pradal Serey, etc. They've got great striking and can take a shot. But we -- the lighter skinned Asians -- don't like to talk about them or acknowledge their barbaric existence, so they don't count.*)
I think that it's (eventually) going to be American Asians that end up bringing honor to us yellow skins. I'm still holding out hope for Andy Wang's return to the octagon.
* See? We're all a liiiitle bit racist.
Highly opinionated but out of touch with the current MMA scene.
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