Per Ace's twitter, quoting Dymonte's twitter. I won't post the tweet because the format always seems to get screwed up, but here's the quote and link:
"It's official if I score high enough on my ACT and I pass summer school for Spanish 2, I'm graduating early to go play football for Michigan."
"Bree Dunn just walked into my house with all of his OSU stuff on. He's about to get beat up."
This should assuage any fears for those people scared he'd flip to OSU. Then again, if you don't believe him yet, you probably won't until he signs.