Although he was probably the one most likely to commit, I am not surprised he didn't by any means. His decision is a pretty big one, as it will likely come with his two teammates as well. IMO if he wasn't commiting for 2 other people as well, he would probably have commited over the weekend.
"He makes it really easy on you as a coach because he has tremendous football instincts," Michigan tight ends coach Jay Harbaugh said. "Things come really naturally to him. He doesn't have to see things too many times. He has a good sense for how things should look and feel, and he's a tough, physical guy."