Been definitely looking forward to this game mainly for it's engine. However, the demo runs like ****.
Intel Core 2 Extreme QX6800 oc'd to 3.2GHz
1 Nvidia GeForce 8800 GTX
The auto-detect sets everything on very high but I end up getting about 8-fps. On the crysis EA forums, theres a 6 page-long thread about people with high-end comps that get low frame-rate, with a bunch of people with different combinations of quad-core/dual-core 2GB RAM/4GB RAM and 1 8800/2 8800 SLI and most of them are getting pretty bad framerates on highest settings.
Either this is a demo-only issue and the final product will run better, or Crytek wants us all to use future-computers.