By "Slow" I meant when I would minimize windows it would drop frames and lag, and unminimizing windows like firefox it would lag and flicker black. I always used the newest nvidia drivers. Certain animations were always perfectly smooth but these were the really fancy more intensive effects like flames n **** which I never use. I have used Aero on an integrated x200 fine, and also no lag on an old ass 9600PRO. so I guess we both have an odd problem maybe related to drivers. There is no way Aero should be slow on your card and compiz slow on mine.
You must have used really crappy drivers. I ran Compiz in Ubuntu off of a live cd on an old P3 with a 9500 Pro and it was smooth as butter, much better than Aero runs on my much faster P4 3.4, X850 XT. Vista is laggy in comparison and I've tried a couple different drivers.
Maybe fast to you is slow to me but I'm telling you, Compiz was really fast the time I played around with it.