Yeah this is the strange thing, testing a beta patch where there is no full screen mode. I haven't tested the beta myself but I noticed improvements with COD when I told launcher.exe to disable aero when it started.
I will not have time to test the beta properly before the patch release but without I was getting reasonable play on my system but with some micro studders over land.
COD @ 1680 x 1050
Windows 7 x64 Ultimate
E8400 @ 3Ghz
ATI 4870 1Gb
4Gb Ram
128Gb SSD System Drive but with COD installed on a 1Tb secondary drive.
Med Settings for COD except for Building Amount and Trees being very low.
2 x aa ingame
Epilepsy Filter and grass - Off.
BTW AI belly lands the planes, including auto pilot. Some good dog fighting though and trying to bring down those bombers is a challenge with 8 x Brit 303's for your armourment.
It must have been a godsend for them when the Hispano 20mm started to be fitted along with .50Cals.