He was making fun of the people who assume that anyone who is any good at the game is automatically a cheater.
That's why he linked to a list of "cheaters", which is basically a list of who-is-who in OA. Obviously most of those people are not cheaters.
I don't throw around the word cheater a lot and have played good people like lukenukem, cortex, lock3 and others. Could it be that maybe just maybe someone who is average also cheats. Also I don't see even in pro matchs with known pros like fatality stafing with the rail gun and that is becuase it is meant as a sniping weapon and not mean to be used up close like he was using.