The problem is that every person I know would say that high school is boring. This is why most of the drug dealers I know dropped out of high school... boring and can't make money sitting in class.
At the same time I found being able to read and knowing basic math useful, but that's just me.
I don't necessarily have a problem dropping out of high school for good reason. But the article didn't show these reasons. First he met these girls one time for lunch? Unless he was really grilling them I'm not sure how smart you can really tell someone is. As a professor I've met students that are conversationally brilliant (witty, charming, etc...), and not surprisingly, it resembled little how strong they seemed in the material.
I'd even consider home schooling first. Teenagers who simply drop out are a lot more likely to get into destructive behavior. If they need challenge, I'm sure there are plenty of people who can give them this challenge in a loosely-structured manner.