Just wonder if there is software which could measure how much real counts per inch defined mouse have. Actual dpi can usually differ from what mouse manufacturer state. Would be very useful,because for example there are still confusement about WMO 1.1 being 400dpi officialy,while in some tests it show 450 or 430 real dpi. And generally it might help a lot when switchin from one mouse to another for the same reason (both may be lets say 1000 dpi,but actual speed can differ a lot).
Guess if there is a program like MouseMovementRecorder which can show only x-axis counts, then by moving cursor from the left to the right side of the windows screen and having in mind screen resolution it might do the job.