Well, let's take a look at a comparison between the schools since Bo has been our head coach (2008-2012).
Over that time period, Iowa had seasons of 9, 11, 8, 7, and 4 wins: a total of 39 wins over 5 seasons which is an average of 7.8 wins per year. Nebraska had seasons of 9, 10, 10, 9, and 10 wins: a total of 48 wins over 5 seasons which is an average of 9.6 wins per year. When you play at most 14 games per year, an average difference of 1.8 is pretty significant.
It's pretty clear that we have not become Iowa, nor will we ever become Iowa.