These are mjfame's kooky settings, which are intended for 800DPI.
We dismissed this curve as nothing more than a sensitivity multiplier, as confirmed by OBsIV. However, it may have some value for snapping onto target, so it's worth testing for that.
If the curve does nothing for snapping, ignore the settings - it's just proof that we can adapt to anything.
What can't be changed is our fine motor control and reaction speed and this dude may have won the genetic lottery. However, theatre mode plus increased playback speed is the better explanation given the KD ratio, so I'm gonna go with clickbait.