Another way would be moving the mouse and seeing the cursor lag behind. Old wireless mices could have some real bad lag. It feels somehow like holding a garden hose and trying to hit different spots on the lawn with the water.
There was people that just didn't notice anything but everyone playing Quake halfway good had bad problems with those. Some went so far as to only use wired mices with ball, not even optical sensor.
There was people that just didn't notice anything but everyone playing Quake halfway good had bad problems with those. Some went so far as to only use wired mices with ball, not even optical sensor.