freitasm: So whtat the mouse smoothing does? [lazy guy asking before running to test it]
I'm really not sure what it's _supposed_ to do, but it just makes everything feel a bit sluggish in my experience. Maybe it's to help if you have a really crappy mouse, but if you turn it off everything feels so much more precise.
I have a Logitech G9 which I run at about 3000dpi and with mouse acceleration turned off. With mouse smoothing off, aim assist off and the sensitivity setting right down to the lowest it feels just like any other PC FPS.