I have seen one or two posts here and there commenting that the recommened system is too high. Here is a chance to see just how low of settings you can have. If you tested the game please post your system stats.
I have a Toshiba Satelitte M45-S265
It has:
100Gig hard drive
512 Ram
Mobile Intel(R) 915GM/GMS, 910 GML Express Chipset Family on board graphics card
and Virtual Mem set at 1 gig
This setup, while not the recommened, runs the game quiet well. It also supports 2.0 < pixel shading which is a must which some Radeons do not support. So the best might not always be the best.