I don't normally subscribe with Jambalaya's Hawk obsession, but he's pretty much right about this.
I have a buddy who follows lines very closely and likes discussing where a various line is it, and how it got there. He's shown me a million examples of Iowa's line being WAY too big in their favor, and not just when they're playing ISU. It seems that Iowa fans throw a **** ton of coin on the Hawks all year long. Iowa's very rarely covers or beats the spread against anyone, and that's intensified in this series.
I wanted to see if this were true so I tried looking it up. Only found one article so maybe you can find another one, but it states that Iowa was 70-49-3 ATS from 2001 - 2010
EDIT: Ah, hawkfan beat me. Serves me right for not scrolling down.