Frankly, I don't want to see him get anywhere close to Webbs 3:53. I'd rather see him just barely break4 at maybe 3:59.6 if he breaks it at all.
Why?... It seems to me that when runners hit phenomenal times in HS, they suffer in the long run. I would much rather see them make steady progress toward better times over years and actually have a solid career than be a flash in the pan.
I know the buzz is interesting and fun, but it would be great to have the next truly "once in a generation" runner hit the scene with some longevity