This seems weird to type out because I am a self-admitted 360 fanboy, but I actually bought the PS3 version of this game. My brother-in-law has the 360 version and I played a couple hours worth of Domination last night(we take turns handing off the controller after each round). Then when I got home last night I spent maybe another 1 1/2 hours playing the same stuff on my PS3 version.
I gotta say I much prefer my experience on the PS3. I obviously realize it's all anecdotal, but I just found that on the 360 there was WAY more campers and surprisingly a LOT of tubers. Also noticed that on the PS3, at least a guy or two would usually be helping me out with attacking the air support, but on the 360, nothing. I mean, I'm used to it from MW2 of course, but it really had a different feel to it between the two systems. It's funny too because it wasn't even my account I was playing on the 360, but I just felt my anger rising with guys just "living" as I like to say in certain spots. When I played Domination or Ground War at home afterwards, I just found people actually seemed to play more like a team.
I still prefer the Live experience and the integration of things, but I'm glad I went PS3 this time.