Urban Meyer is the best or one of the best coaches in the NCAA right now. There is no question. He puts together great coaching staffs, he recruits well, he develops talent well, he game-plans well, and he knows how to motivate his players.
He came to Florida and turned a group of under-acheivers, never-weres, and almost-greats into champions in just 2 years time.
He is constantly adjusting, constantly adapting, and always looking for new ways to get better. (See the addition of no-huddle this year, Wildcat Percy package last year, Jump pass, etc...) Right now it's not even close. You can't compare Lane Kiffin to Urban Meyer right now. Even if UT wins on Saturday, it's just an upset. Lane Kiffin has a lot to prove before he can be ranked with the likes of Urban Meyer in the NCAA coaching community.
Also, he just signed a new contract and said he wasn't leaving for a while. Now I don't know what that is worth these days, but I think he stays in Gainesville a few more years before he moves on.
Lastly, why does everyone think UF will stink once Tebow leaves? UF and Meyer have had amazing recruiting classes the last few years. The Oline talent is absolutely sick right now, and UF has great defensive players all over the field. UF is going to reel in another top 5 class again this year. UF might not be in the national title conversation next year, but they certainly will be in the SEC race if Meyer stays. UF isn't going anywhere.