Unfortunately I can not monitor the gpu usage (GeForce 9600GT).
This is the CPU usage when I start the desert demo. The spike at ~48 seconds indicates the click in the selection screen and I flew straight foward, around the rock and back to startplace. I don't know the framerate, but it work very well.
Here I tride the same in the latest version. The framerate was poor (lower than 1 FPS) and the stick input was also laggy.
Looks for me there is no GPU rendering but only software CPU rendering...