Going from a shine (around 5000 grit) down to 1500/2000 grit dull is a large decrease in order to make the ball not be too flippy. The first step to reduce/control the backend is usually 4000 grit, then maybe 2500/3000 grit. You basically had to go 3 full steps down. I knew the HYpe perl had a strong backend; I just didn't think it was that strong.
I understand what you are saying, and it probably applies to most cases, but even at the green scotchbrite finish, the ball has pretty strong move at the breakpoint.
I do NOT have monster revs, and while I'm not throwing bullets down there, my ball speed is around 15mph on the monitor. Last time it was checked, my pap was 4 1/8> 1/2^, so that's not crazy either.
Nobody I've ever been around has ever been able to tell me why balls do for me what they do, but many have scratched their heads and told me they didn't understand it either.