I have tried and tested from a dailybuild iso
my ati xpress x1150 churning out >2000fps in glxgears running from a live cd!! Too early to bother attempting a hd install I like to use my system.
from my current pardus install <300fps
even with earlier fglrx drivers only ever hit 1000fps
Now I know glxgears is not a proper benchmark, but it is the first ubuntu release that has actually got to desktop from cd with no intervention.
As the title says hope yet