I had fun last night, but it's hard when we aren't as good as we are at BLOPS (and BC2 for that matter). We got raped on a number of matches. We are not used to seeing so many killstreaks and being on that side of the beatings. Now I know what it feels like to play us in BLOPS

We did dish out a few beat downs, but I think we may have lost more than we won. I went negative a lot, very unusual

Did get a couple AC130s though.
The noob tubing, especially in ground war, is ridiculous. It's even worse because we suck and can't keep them in check like we used to. I also hate 9v9 ground war on the maps that are optimized for 6v6. It's way too crowded, hard to stay alive, very chaotic, not really much strategy, etc. Not a fan. I remembering hating the lag on ground war, but it's funny, a year of black ops makes me think that even GW on MW2 is smooth as hell.
Speaking of smooth, it's pretty remarkable how smooth the game runs in comparison. I'm not trying to get into the *why* here, just stating the fact that it does. It feels that it holds a much higher framerate than BLOPS and is MUCH more consistent at it. I also love that your bullets are very responsive in comparison. I'm not sure I got BSed one time all night where I thought I had the guy, but my bullets did not count.
And man this game is FAST paced. From the loading into the game taking probably 1/3 the time of BLOPS, to the INSTANT response of clicking menus to view leaderboards, change class, clan tag, etc, to the insanely fast and intense gameplay, it's just FAST. Like Jammy says, it's like crack. A lot of non-stop action, and when you die, man you respawn and can get right back into it. So fast. Very much an arcade feel. I know COD is pretty much an arcade shooter anyway, but this one is even faster than like BLOPS where it seems there are more gun "battles". I think it's because the guns in MW2 are laser beams in comparison, which ends the "battles" much quicker than fighting the recoil.
I know this title is hit or miss for many of you, but I still dig it. Good times.