That's not entirely true. Yes, he gets your Caleb Rathjen type kids that see other nationally ranked studs there and then he starts going himself, but kids like Ayala and Scheiver have been with him for a since they were young. I'm sure they were already talented, but there are a lot of kids who are talented when they are young that don't go on to win multiple Fargo titles. Just off the top of my head Fort Dodge and Ankeny have both had average kids when they were young start going to Sebolt during JH and end up having pretty good HS careers.
Who are the average kids he made great? I know of some solid FD middle school kids who didn't get accepted into his club because they didn't have the tournament resume to qualify. TJ simply cherrypicks the high caliber guys for his club.