Yes the notes say he was just pointing out what he felt was the best method. I was noting the Asafa connections to some of it.
Maybe. I think the toe drag is a consequence of a long an full extension from the blocks. I was also thinking him being so high on the blocks gives a lower departure angle.
He perches the arch of his rear foot up high on the blocks as does Nesta Carter. I have tried that and like the way it feels better than having my foot lower down omn the pedals.