Yes. Most fall birthdays turn 18 their senior year of HS. He was basically a senior in HS playing C in the Big Ten.
He was a very young college freshman. He also regressed offensively (and in usage) last year versus when he was a very young college freshman. By the numbers and trend, there was little reason to rank him higher last summer. You say its insanity that he was ranked there, but there are clear reasons that he was, and there were clear reasons to rank others higher.
I would rank him higher today than I did last summer, but not
high. But he's moving up the ranking, and that's good. I'm always open to moving guys around as they earn it (or lose it).