My point is more about the fact that having such a high sensitivity is a pretty big handicap in anything that requires fast and precise aiming for instance, assuming you play FPS to any degree and actually want to hit something.
For reference, this is how my desk looks, and im looking for a larger mouse pad.
In Quake, Warsow and BF3, i adjust my sensitivity to the point where i can do 180 degrees from the center of the pad. Thats about 20cm.
In games like CS:S, ill go as low as 90 degrees from the center.