That isn't what UM doesn't against just OSU. That is what they do against everyone. The runs early won't be for big yardage, but will keep running it to wear a defense down. Then they will hit a TE with a short pass for a first down and repeat the runs to wear the defense down.
By the 2nd half -- if you don't have a ton of depth defensively where you can rotate groups of DL, it will break them down and they will break off bigger runs.
Frustratingly effective is a great description. UM isn't flashy. They aren't winging it all over the field. They take care of the ball, they physically wear teams down and try to pull away in the 2nd half.
Michigan is extremely deep this year. Our defensive line, we rotate 8-10 guys throughout the game with zero drop off. Our offensive line, you'd think we would struggle, as we lost 1st all-american OL Zak Zinter in the OSU game, but Michigan's OL has looked great without him.
And contrary to what the CFP game showed where UM shot themselves in the foot repeatedly -- UM usually plays mistake free and with next to no penalties. So they aren't going to beat themselves. I think we only had 6 turnovers all year.