Are you talking multiplayer or the single player combat missions? If it's the MP you're talking about, be sure to sort your servers by ping. I never touch anything higher that 90ms. I've played with 64 players before on a good server and nothing rocks more than seeing ten bodies flying in the air after you hit them with a M203. I'm speaking gaming of course
With the 1.4v patch and Desert Combat .38d and theh No_CD patch, I'm in the game in a matter of seconds. Though I will say it's a very taxing game - course I have everything maxed out.