Another thing:
Northwestern is currently #4 which is last among undefeated teams. However, their ranking has a lot more basis this year than tOSU's, UW's, and IU's combined. I noted above that the top three haven't played any teams ranked above #8. By contrast, NU's four wins were over #5, #6, #7, and #8. Even if they get run off the field this weekend I think they'll still stay at least #4 because those four wins prop them up. Who would you move ahead of them? My answer is Iowa but I don't think I'll get a lot of agreement even if the Wildcats look horrible against UW while the Hawkeyes destroy PSU.