Sorry to be a bother and bump this thread, but I seem to be having the same issues with the demo. I've made sure 'National Morale Objectives' is turned off, is that the only thing I can do to improve performance? I have been debating buying the game for a couple days now and it's the only thing really holding me back at this point.
My computer is a Core 2 Duo E6750 with 4gb of ram and an 8800gtx. I'm running Win7 64bit Premium.