I think Pearl is low there. From a purely coaching(recruiting, game-planning, motivating) standpoint he's probably top 15.
But for all the Calipari love here, how do you explain the collapse against Kansas, and how do you explain him allowing what happened against WVU to happen? If you look at the entire package he's certainly a great coach, but they had every opportunity to win that WVU game and he just kept letting them jack up threes. The collapse against Kansas was maybe the greatest title game choke of all time. It was worse than Webber's flub, because Memphis had to make a multitude of mistakes to allow what happened to happen, Webber just made one. Calipari is not even in Izzo's or K's league.
He's also indisputably dirty, and Kentucky(as much as I hate them) is better than his corrupt ass. They are going to regret allowing his stink to get on their program, and most of them know it. Just let him have one or two bad seasons and all the pent up angst they feel about him leading their program is going to explode.