Yep and Bad Company 2 is a game of teamwork unlike CoD where people just sit, camp, and wait to get the next kill streak thingy to kill everyone.
This is pretty much what has killed MW2 for me. To be successful, you pretty much need to hit your killstreaks, and to do that, you need camp to some extent.
In COD4, you could dominate with or without killstreaks. Calling in airstrikes in choppers were fun, but certainly not mission critical. This might sound like I'm blowing hot air, but there were plenty of instances (in COD4) when I went 2:1, 3:1, even 4:1 without ever bothering to call in the streaks (I'd literally forget about them).
Guns and bullets dominated COD4. Knives, shotguns, and air support dominate MW2, and that's just not my brand of shooter.
Well I just got back from the proctologist (Gamestop). Sold MW2, GoW2, and GTAIV for BC2. Still have COD4 safely tucked away

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