It's definitely changed a lot in the sense that teams are looking all over for coaches. McVay and LaFleur helped pave the way with young coordinators with their early success. Taylor made the Bengals offense a lot better with a rookie QB so while the overall team sucked, their offense had some firepower until the new kid got hurt.
There were a lot of former college coaches that had success like Carroll, then Harbaugh. Kelly and Saban were mixed a bag but there were some organizational issues with those.
I am extremely high on Urban Meyer. I've followed him since Utah when his QB Alex Smith team upset Cal and our backup QB Aaron Rodgers came in and that began his career.
Cal vs Utah - Urban Vs Tedford - Alex Smith vs Aaron Rodgers 2003Urban has done nothing but churn out BCS champions at Utah, then Florida, then Ohio State. Yes he has burned out at Florida and Ohio State and claimed health. I think he puts his everything into it and then has to step away.
My guess is he makes the Jags a playoff team quickly but will be out of the league within 4 years :-).