While I think we can get a lot of butts in the seats in due time, I dont think the hiring of Bowden is going to automatically put butts in the seats the way a "Tressel effect" would. The average football fan may be familiar with Terry Bowden, however, the student, alumni, etc who isn't that big into football isnt going to have the same name recognition with Bowden that you would get with Tressel.
I look for an immediate spike in attendance, just don't expect to have a packed stadium until he produces some results.