I have an old PC in the basement. Definitely later than IE 6. Today, I plugged in my flash drive and tested out the two 3D demos I had.

The first test (CSS triangles):
One frame every 3 seconds with a 5 pixel margin between each triangle, caused only by inaccuracy.

The second test (Canvas and VML):
The program wouldn't even run. Microsoft Office wanted to install, I guess because VML is a component of Microsoft Office.


So, I will use CSS. Believe it or not, CSS is faster than Canvas, and will actually run on older machines.