when I say turning ratio, I mean the speed with which you have to turn the mouse to complete a 360° turn or 180° turn. In my example, I put the mouse on one end of the mousepad. I slowly move the mouse to the other end and before I reach the middle of the mousepad(far from it) I've made a 180° turn(if I continue moving the mouse slowly to the other side of the pad I make a 720° turn) . Now if I move the mouse rapidly from one end of the pad to the other, I reach the halfway point and I've done a 60° turn.
This has been pointed out a few times by several people and I think it's worth having a look into and fixing it. Turning off mouse pointer precision does nothing, tested.