Here's perhaps a more interesting comparison:
Minimum graphical settings:
[Blocked Image: http://i31.tinypic.com/j8fms9.png]
Max settings:
[Blocked Image: http://i29.tinypic.com/29p42n4.png]
I guess the game's CPU limited, at least for this scene, which isn't something you see very often. I guess they lightened up on some of those mass crowd performance saving options in favor of having more indivduals. Too much crowd for my 2.9Ghz C2D I guess.
You can't see it well in this shot but in this part of the demo about a dozen and a half different people in the street are all fleeing from you in different directions while up ahead cops start moving down towards you.