Miami (FL), Iowa, Wisconsin, Penn State, and Michigan isn't that easy of a schedule. They would be helped out by a championship game though.
I'm all for bashing the Big 10, but they don't seem as obviously inferior this year as in year's past.
Don't forget Michigan State. Honestly, the Big Ten may be one of the best conferences in football THIS year, given that some big ticket SEC teams looked awful in week 1 (Florida, LSU), and some Big Ten teams may be better than originally thought (Michigan, Michigan State).
Ohio State plays Colorado next season, and goes on the road to Miami and Nebraska. The year after that, they play a home and home with Cal, and add Cincinnati. After Cal, there is a home and home with Virgina Tech, and another with Oklahoma, then Tennessee (the school is reportedly working on adding West Virgina, and games against Big 12 teams)
Every single major school in the country is going to play a few tune-up games with in-state schools or low majors trying to balance their athletic budget. At least Ohio State, unlike most southern schools, is willing to sign home and homes against a premier program just about every season.
Plus, "choking" with OSU is rare. In the Tressel Era, this team has almost never lost to a clearly inferior opponent (Purdue last year, Florida in 2006, and I think another league game early in Tresselball). If OSU loses, like it did to LSU in 2007, or the first USC game, it is because the other team was better. It happens sometimes.
OSU may lose to Miami or Wisconsin this year, but they won't be choking on a middling Big Ten team or something,