People on LetsRun gripe about the secrecy of coaches like Alberto Salazar and Jerry Schumacher. When a coach like Tinman comes forth with great detail about plans and expectations for the race he gets hammered for putting unrealistic expectation and pressure on his young athlete and for being arrogant . You can certainly see why other coaches don't put forth similar strategy detail and risk being crucified when things don't go as well as expected.
One of the reasons that American kids are beginning to run faster times is due to the rise in expectation. It is tough to accomplish something which you have not previously envisioned. When the mindset was that a sub 4:00 mile was next to impossible for high school kids, nobody was doing it. One of Tinman's talents appears to be in helping Hunter visualize and expect high levels of accomplishment.
Hunter has demonstrated great endurance by winning Footlocker by a wide margin, yet has also exhibited the speed to run 1:48 for 800 meters with no previous 800-specific racing in over a year. That is insane range for a high school kid. The combination of those performances suggest that he could survive a hot pace in the Bowerman Mile. Slagowski has demonstrated the ability to run smoothly in the 1:48 range, but his endurance is a question mark. As much as I would like to see him in the Bowerman Mile, I personally think he has way less chance of blowing up in the National Mile race. He will have his hands full to beat Tamagno in that race. Tomagno set the course record on the storied Mt. Sac cross country course as a junior last year and also ran away from the field in a smooth looking 1:50 in the 800 at the Arcadia meet after being boxed out at the scratch start.