The Iowa guys (i.e. Tom Kakert) that have spoken to him are confident that the teams that have currently offered him are no threat to Iowa. The only threats to Iowa are considered Notre Dame and a big time program like Kansas.
Also, McCabe has stated that he's going to make a decision before the end of July. There doesn't seem to be enough time for him to take visits to Minneapolis, Tempe, Charlottesville, etc.
BTW - good call Plinnius. I whiffed on that one