I'd give it an 11 really. It is so head and shoulders above other games it's not even funny. The people that are complaining about performance and not being able to turn the setttings up seem to be disregarding the fact that even on XP with high settings this is still by far the best looking game out there.
The nay sayers also seem to be forgetting about many of the things that were said over the last 6 months or so....
"it will take PC hardware 18 months to catch up with game."
"The game will run very smoothly on high
settings with todays hardware"
It looks great, runs great and is amazing fun.... and the best part: it's just a demo covering only the 1st level.... this game is going to be amazing