I agree with all that No.2 has said but the facts are Steven Francis has many Olympic and World medallists in his squad and Asafa is the only one I am aware of who suffers routinely at the majors. Maybe it’s more down to Asafa than coach Steven.
When Steven spoke at a seminar I organised a couple of years back he said that in Jamaica they don’t have expert therapists like they do in some other countries. And it seems almost anyone with a basic feel for massage can get a job with these elite JAM sprinters. In any case I think the overwhelming weight of evidence shows that coach Francis can: (A) get his people ready on the big day; (B) get them to the line healthy; (C) get their physical prep ramped up to medal zone.