Quoting George.

Normally, a reply would not be offered for that query, however...

In this case, it may be very likely that: weak video card + shaders = low FPS.
Previously, (in this thread,) there was no explicitly declared assumption (by THIS), that low FPS was a result of some fault in the demo or the engine.

Racing template protoype demo run on PC with:
processor: ~2.93 GHz
RAM: 2 GB
(weaker link)
video card: NVIDIA GeForce FX 5500
- 256 MB RAM

Video card replaces Intel Accelerated Graphics (on board).
At some time, options for card replacement were limited by available slot types on motherboard.

For the demo sample offered above, with lower FPS (press F11 to view), player vehicle movement might seem faster with more jerks and less control. Of course, low FPS probably only occurs with modest specs, like those above.