It's indeed more like battlefield / world at war, not like the modern warfare series (that's to be expected)
However the PC version SUCKS SO BAD, apart from the extreme lag at release (I guess that's normal) the amount of bugs is insane
I can play at 25fps with a quad core extreme 3.6ghz and 2x gtx 280sli, with resolution at 1280x720, texture setting low, and everything else turned off. Despite that I still have framedrops, spikes, sudden 5 sec freezes and so on.
When they come with a patch though, seems the game is pretty good, saw some nice weapons (ballistic knife) altough I'm more into modern weapons, so I won't be playing this much as MW2 (if MW2 only had servers like Black Ops, it would be the best game ever. Highrise & Terminal 24/7 )

The game mods are awesome btw, gungame and others (SHP I think?), really awesome