I just been playing the game for a couple of hours,
I can say that the game is fantastic.. I was playing campaign and I really love it.
As for performance and graphics,
I run the game on 1680 x 1050 : 60... > 16:10 ... Antistrophic On 3.. + Bar on full... Anti Aliasing on 16x (Or 12? I don't remember).. Graphic quality on Extra, and general maxed out.. I get an average of 50FPS..

Amazing. The graphics are not really improved from WaW... the characters color and characteristics are pretty much the same.. (I know that it's using WaW's engine.)
And the starting mission of Campaign reminded me of Mafia 2 for some reason... could be the old-school police vehicles :P aha