0 was a metaphor, approaching zero, but not being zero.
Sure default value is 100, registry key isn't normally there, 0 being not applicable. Almost everyone talks about the value in terms of decimal, because using hex means almost nothing to anyone talking about this specific subject.
You can use 4 instead for instance if you want to witness the same behavior, most people start having erratic mouse issues around lower teens.
I could definitely do a blind test and figure out if it's different, but not the specific value if that's what you're gunning for. Still trying to figure out what value is best.