I get the feeling that I'm the only guy on this site that has no idea what everyone's bitching about. I just turned VOIP off and kept playing, fuck teamwork. I don't mind if my team wins or loses, I'm only really concerned (and concerned really is too strong a word) about my K/D spread. If I've got a positive spread, then all is well. If not? then ah well, I'll do better next time.
Granted, I actually prefer playing CoD:WaW online. Killstreaks aren't as powerful and well, tanks. The only thing I find it has down on MW2 is that WW2 is a little dull after the 9 billionth game, but nowadays modern settings are equally dull. Besides, I love me a good but of history.