Covers all levels, DX9, DX10, XP, Vista, min fps, avg fps. Pretty sweet article. For all of you that think 30fps in the demo level benchmark will get your through the game, think again.
http://www.pcgameshardware.de/?menu=browser&article_id=621689&image_id=737512
http://www.pcgameshardware.de/?menu=browser&article_id=621689&image_id=737512