Spotted this in a Phoronix article today:

Overall it seems that most of the computational tests are performing better with the newer Ubuntu 11.10 and 12.04 user-space packages, which upgrades the GNU Compiler Collection to the 4.6 series over the 4.5 release found in Ubuntu 11.04. The 4.6 compiler upgrade with greater ARMv7 architecture enhancements is likely what can be attributed to most of the performance improvements found in this article. [...]

See the results for yourself at:

http://www.phoronix.com/scan.php?page=article&item=nvidia_tegra2_ubuntu&...

Good job,