That's what Marshall did. Now, I'm not saying Miami is Marshall, but I am suggesting that it's not something that Ohio State is unprepared to deal with. In fact, a lot of teams have tried attacking Ohio State like that over the years. Only a handful have beaten them with it. Illinois 2007 being one.
As for no huddle... meh... it's not a new thing. I don't know how much you know about Ohio State football in that you don't follow the Buckeyes, but... this isn't 1975 bro. Despite the perception of slow plodders, Ohio State has played against every style of offense you can imagine... including the triple option, even. lol
Pryor the Soph and Fresh was fairly easily rattled. That's not a bad plan, but the Pryor I saw in the opener was calm, cool, confident and collected. I have some confidence in Ohio State's O-Line, but I also expect that when that breaks down (and it will) Pryor has good legs too. Miami will get to him, I'm sure, but it's going to take fresh legs all game to do it. Miami has a good secondary, but even the best can't cover forever. So... pressure, like you say, will be key. Again, I like that Pryor can get outside the pocket and he keeps his eyes down field.
I give Miami's secondary a slight edge over Ohio State's. But, the "speed" thing is typical BS.... There's speed everywhere in college football, and certainly at your top tier schools - including Ohio State. No DB on OSU's roster is going to struggle with footspeed vis a vis Miami's recievers. As for size... well... Once again... Miami isn't full of "never before seen" people. It's pretty common for teams to have match up problems, or even a couple of them, on the roster. Miami isn't any different.
Let's not start this [censored] again.