I had a similar experience yesterday in Iowa City. I was with Hawkeye fans, wearing my Cyclone stuff. I expected some not-so-friendly words thrown my way at some point, but didn't hear one. There was some good natured ribbing before the game, but afterwards it was mostly quiet. Like me and every other Cyclone AND Hawkeye fan, I think everyone was stunned at how one-sided the game was this year.
The only incident I witnessed was after the game. As we were walking from the stadium to our lot, a trashed (and trashy!) Iowa fan who looked to be around 25 was with his girlfriend and another couple. He was yelling "I-S-SUCKS, I-S-SUCKS" and "Go back to Lames Clowns" to a group of ISU fans in front of us. His poor girlfriend was apologizing to everyone, and the other couple looked equally embarrassed.
The funny (and refreshing) thing was when about 5 different Iowa fans yelled stuff like "Shut the F--- up d-bag" and "They'll go back to AMES and you can go back to your trailer down by the river." Everyone within earshot laughed and/or applauded. It was nice to see.
All in all, I enjoyed my experience there.