I was addressing your comment that Kingsbury has not developed any major quarterbacks.
At this point in his career, he has only had two starting quarterbacks who he has had multiple years to coach and polish.
I already indicated that one of them, Case Keenum, had no other offers from D1 schools, other than Houston, and under Kingsbury was developed into one of college's most elite QB's in recent memory... posting three seasons in which he threw for over 5,000 yds and 40 tds under Kliff's tutelage. That kid who no school wanted is now a bona fide starting NFL QB.
I will not even grace the argument that Kingsbury deserves no credit for his work with Manziel.
To punctuate this discussion, Here's your argument that Kingsbury has not developed strong QB's during his coaching career: