Playing Via Pug's steam today , i got no lag in SP and very little lag in MP. When it did lag a bit, it was just for a second here and there. So far i have played in HC and non HC TDM only. I like the few maps and guns that i've played on and used so far.
Sadly, i don't think admins have much control still. HC servers still have a respawn wait time from 5-15 seconds, and the score limits seem to be preset at 10,000. When you level up and unlock guns, you still have to purchase the guns with the currency earned in game, another lame feature IMO.
So far, i'd give the game itself 7/10. It plays exactly like MW2 , with some improvements. The main one being you can ban hackers. I did kill someone with an RC car. That was pretty cool.
UPDATE. I just got done playing Gametype Demolition in a hardcore server and it was fkn awesome. No spawn times at all.
For those that don't know, in demolition one team defends targets A and B, and the other team tries to destroy it with a bomb. Each time you respawn, every member of the team gets a bomb. You have to destroy both objectives in the allotted time limit to win. I forget what the time was, maybe seven or eight minutes, but it's very fun. In nuketown, it's fkn madness. Once a round is over, you switch from defending to assaulting. It goes best two of three.