The Handy, FW 3.2.3. Based off my experience:
Max: 500 unit/s
Min: 34 unit/s
This is the safe zone where the Handy will perform the scripted action correctly.
Faster strokes risks being shortened. This is mainly observed at fast downward strokes where the slider does not reach the bottom.
Slower ones leads to stopping. Sometimes the Handy cheeses slow actions by shifting nodes / blending actions.
➥ https://discuss.eroscripts.com/t/managing-stroke-speed/128238?u=falafel
Subject to change in FW 4.