This is my personal opinion.
If CMC isn't offered the ND job at this time, if in 5 years ND comes calling again, he'll turn them down. I think he loves it in Ames. I think he'd love to have the ND job. I also think that he'd be pretty hurt by not having the job offered to him. If we get through this, the only job we'd need to worry about CMC leaving for is Ohio State. In fact, he may be appreciative enough of the trust that JP has shown him that he may just say, "Screw it. I like Ames. I'm staying here until I retire or I'm forced out."
By the time I actually posted this, he'll probably have accepted the Virginia Tech job.