I can't believe it took until page 3 for someone to come up with the most relevant point. Well, maybe I can.
Training age is far more important than chronological age.
(That's of course assuming you're not talking about a kid whose crazy parents had him out pounding the pavement as soon as he stepped off the bus from elementary school, and fried him before he even got to high school. Needless to say, this was not the case with Hunter.)
(That's also assuming the kid in question is not an actual "age cheat" which Hunter clearly is not.)
I won't agrue that a full year would not be a relevant factor, especially for boys, but a few months either way does not make or break, or even substantially affect a runner's success level.
Far more important are how long he has been running, how consistently he has been running, how smartly he has been training and racing, and how healthy he has been able to stay. This is all of course on top of how much underlying talent he starts with.
The month of his birthday is just not a significant factor.
Hunter is clearly an amazing talent, who has been smartly and carefully trained, and who has added to the equasion a huge amount of dedication and commitment.
That's why he's as good as he is. Not because of what month he was born in.
Now, as far as whether he will win Foot Locker or not, we'll just have to wait and see, won't we? There is no such thing as a sure thing. Especially in sports. That's why they run the races.