One of the troubles with this scale is that I'm not sure what "coaching" means in this context. Some people seem to take it to mean "in-game adjustments" and "end-of-game strategy" and "set plays" and stuff like that. If that's what it means, then Pearl is probably a C or so: a D at adjustments and endgame, and a B on set plays (particularly out of bounds plays).
But if "coaching" means pregame prep, scouting, having a plan that is difficult for the other team to deal with, then Pearl's an A.
There's also the whole "communication with players" thing. Some coaches have brilliant plans, and their players don't execute them because they don't understand their roles. Pearl didn't have that problem, his players knew what he wanted.
Recruiting is nowhere near as high as some of you guys are making it. If Calipari is an A+, then guys like Self and Donovan and Barnes are the A- or B's, and Pearl's nowhere close. C- at best.
Development is overrated. I'm struggling to think of any player at any school that came in at one level, and left at a completely different (better) level. It happens, but it's rare. You have to get great players, period, and then you have to put them in successful situations. If "player development" was a realistic plan, then Cuonzo's recruiting would scare us less.
I'd rate Pearl thus:
Game planning: A
Motivation: A
Communication with players/player execution: B
Recruiting: C- (even that may be generous)
Development: C (some guys improved, some didn't...looks about average overall, to me)
In-game adjustments: D