Like the Nexuiz results, Xonotic with low quality settings when running on the Radeon Gallium3D driver can actually compete to some extent with the proprietary Catalyst driver for a majority of the graphics cards that were benchmarked under Ubuntu Linux. These results of Xonotic at 1920 x 1080 with low quality settings doing so well between the "Tweaked Git" and Catalyst were great to see.
