I agree. I tend towards the larger games. The max in MW2 is 9v9 though. But even 6v6 feels decent on most maps because you respawn quick and there is usually tons of action.6vs6 is small, I don't care what kind of game it is. I'm not saying it should have 64 players, but even 8vs8 would be better and more normal. I'm used to playing closer to 12vs12, in small close-quarters gun fights. I just don't know... I'll have to play it to see if I like it.
One thing, good or bad, is the airstrikes seem much less effective. But then you have attack choppers that tear it up still.
But a good thing with smaller games is less grenade spam.