He's been recorded at 102. BTW, he felt that his mechanics were a mess and seemed to blame his shoulder problems on his mechanics.
The toe tap was something he just stumbled on. It was supposedly some drill having to do with his toe pointing down or not and he accidentally touched the ground and found he could throw harder so he kept doing it.
It is hard to tell from the pictures but it looks like he toe taps with his stride foot a fair amount closed and does swing the leg around a bit into foot plant then lands closed with the foot pointing open. Once again, still pictures so they can be very misleading.