At least, the ati driver is faster than the open-source ati driver in RIPLinuX, which is no slouch. I ran the Peacekeeper Benchmark using the exact same version of google-chrome on both systems, and here is what I got:
Chrome(v16.0.899.0) under RIPLinuX Scored:
3562 Points
Chrome 16.0.899.0 under Slitaz scored:
3787 points
Both on an E350 AMD board. Note that tests on AMD 350 boards indicate they give the same performance scores.