For me, two things combine to make it feel super responsive: 1. The latency between you moving your finger(s) and seeing movement on the screen feels imperceptible. 2. There isn't any "lost" movement - if you scribble your finger around really quickly and come back to where you start, the cursor or window scroll position will be back to where it started too.
I think you misunderstood what I meant by non-responsive. 10ms latency from click to action is nowhere near as noticeable as 10ms latency when dragging, because the mouse visibly lags behind.
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