I was told by a former Iowa player who has NFL contacts, that he was told by an NFL scout of over 25 years that JVB would be invited to the combine and if he had a good combine could be a late round draft pick.
Their reasoning was:
1) This was the slowest Iowa team in 25+ years.
2) Iowa had absolutely no skill players for JVB to throw the ball to.
3) They offensive system that was implemented at Iowa was an absolute joke. Especially given the fact that it is predicated on speed and skill players, of which Iowa had zero.
Scouts recognize this, and also recognize that JVB had success in his previous two years.
I was surprised to hear this, but it does make some sense, and comes from people in the NFL who kno what they are looking at and for.