Most recent popular games (FPS, MOBA, MMO) make use of the entire mouse movement area.
However gamers are more prone to adjusting their mouse DPI for comfort. To some this means wide sweeps across the desk for minimal movement to maintain accuracy at the elbow. For others it means the slightest flick of the wrist sends the cursor across the screen for maximal reaction speed.
And of course many games don't use the mouse much at all still. I don't think you can really categorize gamer mouse usage in any way other than "comfort to efficiency ratio per task".
However gamers are more prone to adjusting their mouse DPI for comfort. To some this means wide sweeps across the desk for minimal movement to maintain accuracy at the elbow. For others it means the slightest flick of the wrist sends the cursor across the screen for maximal reaction speed.
And of course many games don't use the mouse much at all still. I don't think you can really categorize gamer mouse usage in any way other than "comfort to efficiency ratio per task".