Leaderboard

I do need to get around to do these tests, I've got a bunch of mice ready to go!

Yes, this is correct!

This is called frame buffering from what I gather. It aims to stop stuttering and repeated frames by working in the past and showing you what it knows it's already rendered and not be scared that the next frame won't be ready. This adds latency as you're running a few frames behind, so it's not just the mouse that's behind, it's everything being shown on your monitor. For competitive games you're much better of having it off, reduces latency. For non-competitive games, it might give you a smoother experience which you might find more enjoyable, but even then for me I'd still prefer the lowest input lag, regardless of possible tearing. The effect does reduce with higher refresh rate monitors too. You can see what it does here, explains it much better than I can in words: