Not tried MP yet, but SP, absouloutely shocking!
I'm running E8500 @4Ghz, 8GB 1066 DDR2 memory, GTX 260, and I ran MW2 brilliantly.
Not only did we have to wait to be able to unlock the game, but we get this rubbish and all. Not happy!
Sort it out treyarch! I'd hate to walk around saying...