It's really interesting, that the water effect now works. Maybe xserver 1.3 made it work and/or the newer mesa. Just tested it with intel onboard, there it worked now too. If you want a real challenge I would prefer to test gl2benchmark which is using openscenegraph (it is in the Kanotix repository). Not only the numbers are interesting, but also IF the test can run. And there is the problem: only 8.40.4 was capable of running test 3 and 4, nothing newer. Also standard xorg drivers gain more or less nothing in these tests. Testing only games or compiz is not everything... openscenegraph could be used for much cooler things, even playing movies in a 3d environment - ab bit like metisse but fully programmable and you could add additional effects of course too.