A few benchmarks I did:
What doesn't change:
linux-image 2.6.34 (custom one)
xserver-xorg-core 1.7.7-1
$ cat /proc/cpuinfo | grep name
model name : Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz
model name : Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz
I run Debian Testing, with sometimes a few unstable packages, and recently tried experimental Intel Video drivers recently.
My OA video options were default, I moved my config.
===
With Intel 2.11.0 (from experimental)
Mesa 7.7.1-2 (from testing)
56.8fps, 57.1fps
Mesa 7.7.1-3 (from unstable)
57.4fps, 57.5fps
Mesa 7.8.1-1 (from experimental)
58.9fps, 59fps
===
With Intel 2.9.1 (from testing)
Mesa 7.8.1-1
67.6fps, 67.9fps
I didnt test other Mesa versions but I may do that.
(done using this Demo:
http://dri.freedesktop.org/wiki/Benchmarking )