From a post in the Bluesnews thread re. Lost Planet demo:

"This is already the second DX10 demo where nvidia owners have at least 3 times the framerate and better image quality than the HD2900XT fellows (CoJ was the first DX10 demo). I'm still waiting for the DX10 demo where ATI excels over nvidia like predicted by many ATI fans."

Um, ok. Can anyone confirm or deny this? No direct response to the guys claim nor other info is provided in that thread...