Hard to tell really due to the way the game plays, doesnt feel anything like quake with its directness of control - but on the other hand I dont have any complaints with it, seems more than smooth enough and controllable enough for me.

yes slunge said it, its hard to feel & tell.

i played the mp beta and like the full game. its fast action, 10 minutes games and the vehicles dont interrupt to much - as long as i drive no tank :D

May be a little late, but just in case anyone else is interested: Ye, BC2 forces mouse smoothing by default and mouse smoothing naturally causes input lag, nothing major tho. I've turned mouse acceleration on (easily done via GUI) and it feels comfortable enough for me, without accel it felt a bit weird for me, but maybe that's just cause I'm using accel in quake for like 10 years :P . There are ways to get rid off mouse smoothing if you really can't live with it, kinda tedious tho cause it requires the editing of several game files.