We have gotten high star guys before and more than likely they don't pan out, but to say never that's incorrect. Your loudness about not lilking 3* guys is unwarranted, Iowa has always done better with these type of recruits. Not saying they don't want the big fish just typically Iowa develops talent.
Saying they do better with 3* guys is a dumb statement. They have more 3* guys succeed, but that's because they odds of getting a few to succeed are much greater when you start with more of them.
If you have 3 5* and 50 3* guys on a roster is it sure easy to say, yeah more 3* pan out because the odds are higher you will find a few.
Of Iowa's 5* (from scout) in the past 10 years:
OL Mike Jones (2003)- success
TE Tony Moeaki (2005)- huge success, best TE KF has ever had
OL Dace Richardson (2005)- success, even through injuries, probably would have been top 3 linemen of KF era if not injured all the time
OL Dan Doering (2005) flop
That is a 75% success rate. Yes I conside Dace a success as he would have been great without injury, and its not his or KF's fault for that.
What about 4* guys?:
2002:
OL Chris Felder (flop)
LB Ed Miles- (success)
QB Nathan Chandler (JC success)
K Kyle Schlicher (success)
2004:
CB Walner Belleus (JC, flop)
2005:
OL ryan bain (flop)
RB Kalvin Bailey (flop)
OL Raf. Eubanks (success)
DL Tyler Blum (flop injury)
DL Alex Kanellis (flop, injury ended career)
WR Trey Stross (maybe a flop, maybe a success, I say neutral here)
QB Jake the snake (flop)
2006:
DE Adrian Clayborn (success)
LB Jeremiha Hunter (success)
LB AJ Edds (success)
P Ryan Donahue (success)
2007:
CB Cedri Everson (flop)
OL Bryan Bulaga (success)
LB Tyler Nielsen (success)
S Jordan Bernstein (success)
DE Christian Ballard (success)
2009:
RB Brandon Wegher (flop)
WR Keenan Davis (success)
2010:
TE CJF (?)
OL Donnal (?)
2011:
DT Darian Cooper (?)
RB Rodney Coe (flop-but not KF's fault he couldn't get to campus)
Ol Jordan Walsh (?)
2012:
RB Greg Garmon (Flop)
DT Faith Ekakite (?)
DT Jaleel Johnson (?)
If you don't count 2010 and beyond, because we really don't know yet. That is 13/24. that is 54%. Would I like to see that higher, yes, but hey I gurantee if I did it for the 3* guys it would not be that high.