Using the open drivers in Jaunty with a 200M you can notice a slight delay with Compiz while maximizing/minimizing. Kwin is not that bad, but you can indeed notice some lag when maximizing/minimizing as well. Using xterm with the open drivers is smooth as silk however, whereas with fglrx its simply painful; Metacity takes at least 3 seconds to update, and Kwin bogs down to a crawl.
No announcement yet.
Open-Source ATI R600/700 3D Driver Almost Working