Sounds like someone sold the dad a bill of goods of how the kid needed to be trained without the experience(of the dad) from which to assess what is necessary in achieving that speed development.
In what way is that training going to accomplish his development of speed that his dad talks about? He likely does not enough to make such an evaluation.
I guess you are not in position to train the kid anymore but I wonder if it would be any use contacting the dad to let him know about the problems with the crap you have posted here.