I finished the single players campaign yesterday afternoon. I've only owned the game for a week today and I certainly wasn't playing it daily or that often - though with FPS you come to accept the short single player campaign.
I've been playing a bit of the multiplayer, I really like some of the new game modes especially domination. No dedicated servers does let what could be a great game, it is unfortunate. though I haven't experienced bad lag, usually get 4 bars (full) 3 bars is a little lagy but not enough to stop playing just sometimes you get lag spikes and when I was playing last night the server migrated to a better one for all.
@ Omie Jay - Keyboard and mouse ftw.