Right - but when you stop moving the mouse, there's now an extra 17ms before you see the result. I assume that's his/her point. Maybe this wouldn't bother me a

Right - but when you stop moving the mouse, there's now an extra 17ms before you see the result. I assume that's his/her point. Maybe this wouldn't bother me any more personally, but I bet I would have noticed it when I was 23!