Hi Eric,

I've download the demo. On my machine (GeForce FX5200, Athlon 800) I'm getting the following frame rates:-

Lambert - ~44fps
Blinn-Phong - ~20fps
Phong - ~25fps
Thin plastic - ~20fps
Sharp specular - ~15fps
Rim lighting - ~24fps
Velvet - ~18fps
Sheen - ~15fps

I do normally find I get better framerates when the app runs in full screen rather than windowed.

On the other machine (GeForce 3 based card with Duron 1.3GHz) I get the message 'This demo requires GL_ARB_fragment_shader'

If you need me to do anything else, let me know.