They are really entirely different games (and not due to the connection speed). 2 on 2 is more a display of individual skill (almost might as well be playing one on one deathmatch) while in larger games you succeed more through solid teamwork.
Just pointing out that people will probably be answering a slightly different question than you actually asked /~unreal/ubb/html/smile.gif.
Personally, I find both highly entertaining at different times. If I had to pick one, I'd pick the larger team games, however.
Mute|PuF: Rumormonger for hire.