OkSt surely can do a lot of things well, but one way to think about this match-up is from their perspective. Who would they like to avoid? Probably a team that can effectively slow down the game, doesn't foul, doesn't turn the ball over, and can effectively take advantage of transition opportunities. Sound familiar?
Now, they do have a couple things that Michigan would like to avoid -- offensive rebounds and dribble-drive guards (and Forte will run around all day and test us that way). But if I'm Michigan, what scares me the most is a team that in addition to those things has a post presence (or two), will make us play a full 30 seconds of defense, and will try to make us take tough 2s. And, at least lately, Michigan has had the most problems not with the initial drives but with secondary drives off kick outs. I'm not sure OkSt will have the patience for that.
In sum, in my view, OkSt is scary because they're good, not necessarily because they're such a bad match-up. But we are scary to OkSt for both reasons.