I would reckon that overshoot (the mouse cursor moving "backwards" after over-prediction) is significantly worse than undershoot in terms of user experience. We

I would reckon that overshoot (the mouse cursor moving "backwards" after over-prediction) is significantly worse than undershoot in terms of user experience. We can easily compensate for mouse acceleration not being constant (ask anyone with enhanced pointer speed). But the pointer doing qualitatively different movements than what you input is annoying. In the limit I guess this boils down to "do no prediction" (which I also suppose is what the linked site's conclusion is).