Apparently, that is actually true (not the same magnitude of effect but the same kind of effect - better concentration). And it's not in any way contradictory to it also being a medication.
> The dose I take would make a non-ADHD person into an obsessive hyper-focused teeth-grinding mess, but it basically just makes me normal.
That is almost exactly what the quote above said.
> Adderall is real medicine which cures a real problem.
I honestly don't understand how you got the impression that the original article claimed otherwise.
I believe you, but couldn't you equally say "The dose of human growth hormone I take would turn a non-Chronic-Shortness-Syndrome person into a freakish giant, but it basically just makes me normal"?
Adderall has a lot of utility for regular people, it works exactly like caffeine. Eventually all that dopamine from the amphetamines is going to ruin all your receptors, hth.