I think you are missing the point, freedom1. The point is, there are very effective techniques that MMA neither teaches you to use nor prepares you to defend. Obviously Fedor is a really tough guy. Here is the point: Fedor fighting "dirty" would beat Fedor fighting "by the rules".
"Dirty" fighting is against the rules specifically because it is too dangerous to the fighters to allow it. Think about that. Once you realize that fighting "dirty" is more effective, comments proclaiming MMA fighters are automatically better than military fighters are just silly.
Any advantage an MMA guy would have in a life-or-death fight is because he is a professional fighter, so he is extremely fit, fast, and tough. Yes, obviously, being extremely fit, fast, and tough helps you in any fight, dirty included.
But being trained in techniques that would not work in a dirty fight, is just plain counter-productive. Think about it, and use common sense. Since the Gracie revolution, MMA guys have to train a massive amount of time on the ground, just to compete with the ju-jutsu and wrestling guys.
But allowing eye-gouging eliminates just about 100% of all ground technique, rendering all of that training completely useless, if not counterproductive. I.e., some dumb-a$$ MMA guys tries to double-leg me as a set up for some ground-and-pound, and he is going to have my thumbs so deep in his eye sockets so fast he won't know what the frick is going on.
This doesn't take much imagination, does it? Let's talk about the really nasty effects of clawing people, shall we? The last thing you want to do is try to wrestle or even get close to a dirty fighter. MMA does not even prepare you to think in those terms, and thereby actually hurts your life-or-death instincts.
Last point here: MMA fighting is inherently rule and location dependent. For example, didn't Fedor get thrown on his head by somebody in Pride (a perfect 5-point Greco-Roman wresting toss)? If Fedor is being thrown on anything but a springy ring floor, Fedor's head is broken and he is done. Do you see what I mean? In "real life" combat, Greco-Roman wrestling, with all of its nasty high throws, may be a lot more effective than MMA. But it is rendered weak by the rules and conditions of safe MMA fighting.
Fedor is the baddest MMA fighter, by far, no doubt. But let's not get carried away.