Even on a pretty high-powered system, the actual racing portion of the game is impossible to play due to extremely laggy performance on the graphics.
Lots of jitters and jolts, and slow response to control.
I think it falls on the fact that they make heavy use of blurring effects.
(Specs: AMD A8 APU (4-core 2.4Ghz), 8GB DDR3, Nvidia GTX 550Ti graphics, Mageia 2 (Kernel 3.3.8))