Played a bit online last weekend and you're definitely squeezed in there a bit. More like close quarters combat than MW2 and BC2. My understanding is that they are (or have) released more maps too...because I was getting real bored with the 3 or 4 that kept repeating over and over. It's not normally a problem if the maps are big enough...but being tiny, crowded, and repeating...didn't like that.
There was something interesting about it only though that I can't quite put my finger on. It kept me playing for more hours than I expected. I might play some more this week and then switch to New Vegas for the weekend. I'll probably trade this one in for Black Ops in a couple weeks.