Most of us never said anything like that, although it should be noted that a very large reason for the team's success is the contributions from underclassmen (Muschamp recruits). Even if we did say that, it would be no different than saying Meyer turned around Florida pretty quickly considering he won the national title with Ron Zook's recruits.
I think the majority of us were just unhappy with the way Urban left. I do think his health problems were legitimate, but he should have stayed "retired" the first time and all would have been fine; it's his un-retirement that led to the disastrous final season in Gainesville. That's what left a bad taste in our mouths.
He quit early that season when he realized he shouldn't have come back. His uninspired coaching had stone legs John Brantley running the option, an offensive line coach calling plays when he had ZERO business doing so, a divided locker room, underachieving and undisciplined players (on and off the field), a team that played soft and unprepared, etc. He set the program back a couple years.