Yes, I'm on a 5-year-old PC that doesn't have a dedicated graphics card, so that may be the problem. Some of the easing examples just look slightly more uneven and jerky than the others, with a little "bounce" at the beginning or end, but that's about it.
Edit - Fiddling with hardware acceleration settings helps make the effects more visible. Time to get a new PC, but I'm dreading getting lumbered with Vista.
