I didn't say TJ would take his players to Duke, just that if he went to Duke he'd need guys that are lottery pick types out of the gates. Duke is on a whole different level than ISU and personnel is a huge factor in that.
Briefly looking at Iowa's schedule, I'm not sure if winning 20 games with your own players that you had success with elsewhere, in a super top-heavy B1G, is that impressive.
FWIW it seems like he's a good coach, but there's no reason to anoint him of doing much since he really hasn't.