SultanofSwat - very interesting data.
It made me wonder what percentage my son was at right now so I did the math (hopefully correctly.) Since he's about 2-3 inches shy of a 7-foot stride, and he's 5'10" it seems he would be at 120% or just under that.
Trainer is having a bullpen session later this weekend and wants my son there for it to see what he looks like on an indoor mound... so we'll see.
Thanks for the info!