The most seamless multiplayer game?

What's the most seamless multiplayer game you've ever played?

Hm... honestly not sure. MAG is generally okay, but when it lags.... it LAGS. As in, crashes your game lag.

I would say burnout paradise, I think that's the best It's ever been IMO

I think Battlefield 3 will take this.... 
 
  

Guess I am not sure which Multiplayer is most without seams....I would say one of the CoD games, but the online community is pretty bad

Jedi Academy

Battlefield 1942.