I really want to get behind WebGL, but when is it going to have decent performance/compatibility? I tried this out in both FF and Chrome on a powerful desktop computer (i5-4670K, GTX760, 16GB RAM) and it was glitchy/stuttery as described. Firefox rendered some scenes at what seemed like 2-3 FPS. Chrome was much smoother, but I couldn't tell what parts were glitches. For example, the "classic demoscene water effect" looked completely different in Chrome. But neither FF nor Chrome produced an effect remotely resembling water.
Although this looks like a great library, personally I prefer to stick with OpenGL programming until WebGL's quircks are sorted out.