I have a suspicion with the stuttering. My guess is that it's caused by the sound, not the graphics. I noticed that I received a small stutter when firing the stationary heat seekers. Everything else was perfect. Based on the earlier BF1942 that had issues with sound, try turning off EAX and see if that helps.
Played it and had alot of fun. Those claymores are nasty little mothers, place a few around your sniper spot and camp away
The only downside is that you cannot bind the PgUP/PgDown/End/Home/Ins/Del keys, they seem to be locked to commander functions, e.g. ack/nak and so on. As I use the arrowkeys (I'm a leftie) I used to have those bound to various functios in DC like enter vehicle. I'm sure I'll get over it but it's a nuisance.