I don't know him, but his name has come up quite a bit over the past year. He claimed he would beat Cheserek's record in Manhattan. Then he was saying he would win NXN.
He does a lot of talking before doing things and falls short.
I think he has it in him to go sub 4 but he should concentrate on his training and keep his goals to himself before bragging about it.
Maybe he uses these statements as motivation, but he would be better off finding another strategy. Besides how it looks to others psychologists know that when you announce a goal that part of your brain already thinks that you did it from the attention you receive.
Again, I don't know the kid and wish him well but if you are him or his friend some humility will serve him better and make him look better to the community as well.