There were only a few cases where one driver was much slower than the other. IMHO, you should be focusing on those. e.g. Catalyst took 0.09s vs. radeonhd's 0.12s on GtkTextView scrolling. Text scrolling is definitely something that can make a desktop feel slow. e.g. server mobos with onboard mach64 chips suck so much with gnome-terminal that xterm is preferable. (Fortunately, the newer ATI E1000 chipset is up to par and can run a gnome desktop pretty well. No 3D accel, though, since the HW omits that functionality!)
No announcement yet.
AMD R700 2D Driver Performance Comparison