Iowa actually did pretty well against spread offenses in 2011.
To not be excited about Herrmann assumes that he has somehow managed to not learn a thing since he last coached at Michigan and that he has somehow managed to maintain employment at the highest level of his profession despite the fact that some Walmart Wolverines thought he sucked. In other words, if he was good enough for Lloyd Carr and the Super Bowl champions, it's insane to think he'll be in over his head at Iowa.
Putting aside his coaching chops for a minute, the dude recruited the Big Ten. He knows the coaches so he can hit the ground running. A shiny Super Bowl ring doesn't hurt either.
In my mind, he is the IDEAL candidate and we should be thrilled to have him if this rumor proves to be true.