Many years ago, back in the 80's, this black fellow explained to me the origin of the term "boy" when applied to male African Americans. I politely listened, and decided it was reasonable to respect his concerns in the matter.
By the same hand, because I did understand his point, I find it somewhat off-putting when African Americans, like this author, call me "white boy." It has the same meaning today as it did then, and this fellow, while writing a pretty good, thoughtful piece uses the term to the point of being gratuitous.
Other than that, he's mostly correct.