Comment by ClumsyPilot

I have tried like 5 Bluetooth mice, since BL4.0 the latency has improved from 'terrible' to 'tolerable'. It might be something to do with the windows bluetooth stack, as i noticed the respobce was more sluggish during high CPU use, while USB mice seem unaffected.

The same logitech mouse performs much faster through their universal wireless adapter than trhough bluetooth (it has 2 modes), they also have lightspeed adapter, but I haven't noticed much difference.