I find the way they handled the upgrade amateurish.
They rewrote whole sections of the kernel, xorg, and mesa.
Whether directly or as a result of their requirements.
How about some test results for Xorg 7.4 and 7.5
Say Ubuntu Intrepid IBex and Ubuntu 9.10 alpha 6 with latest updates.
Post some screen shots of image quality.
My own tests still show a loss in quality and speed.
Sure games like Unreal are playable but standard OpenGL throughput seems deminished.
Neverwinter Nights is a good example. I don't have much of a framerate change. It's a cpu intensive game.