Fact-OU had offered Bob the job before his interview with Iowa. Bob told OU he was going to interview with Iowa before he was going to make a decision. At the Iowa interview, Bob told the committee that OU had offered him and wanted to know when Iowa would make their decision because if Iowa didn't want him, he wasn't going to risk losing the OU job waiting on Iowa. As we all know, Iowa was noncommittal and told him the decision was going through a committee, and they didn't know how long that would take. To which Bob left the interview and immediately called OU and took the job. And yes, I personally know he would have taken the job if Iowa had shown interest and given him a reasonable timeline for a decision.
With that said, I am not 100% convinced he would coach Iowa today.