According to this article, Brian Ferentz admits that a touch of the spread offense could stretch the field, but don't expect the team to go full spread right away. Iowa's bread and butter is the offensive line and running the ball, but he does understand the need to lure some of the 7 or 8 defenders out of the box.
https://www.landof10.com/iowa/iowa-football-offense-brian-ferentz-news-update-spring-practice-2017
https://www.landof10.com/iowa/iowa-football-offense-brian-ferentz-news-update-spring-practice-2017