It's essential that one has a coach and plan that they believe in. They are doing it everywhere else in the world. Both JK and Mark know what they're doing and their training approaches are very similar. The key is consistency and upping the mileage and intensity from year to year. If you are not progressing, you are regressing.
Nothing stays static.
He sounds like a monster. It is good to see him running well. I think he will raise the standard of excellence around the country to what it should be by running under four minutes in high school. I also think that the internet has helped people think more globally than before. When I was in high school, I never knew who was running well across the country until Track and Field News' rankings came out.