Yes, it was not very full at all. The entire east side student section upper deck had about 20 people in it. I'd guess ~10,000 actual attendance.
And it was kinda dead. Lots walked in late - I parked at 6:55pm, and walked in at the 13:30 mark - and lots were behind me. And it took us a good 1 minutes to warm up and cheer after that.
The roads/streets in Ames were a mess. University Blvd, Duff, S 4th were all slick as hell.