Not that Hendricks didn't earn a title fight, but when you consider that Hendricks won a close decision against Koscheck, whom GSP rag dogged and bullied for 5 full rounds, and Diaz lost a close one to Condit who actually gave GSP as much trouble as anyone has in a losing effort since Penn. Then I can see the logic in seeing Diaz as a more 'worthy' challenger.
And where did those rankings comes from? Fitch #2, Koscheck #5, Kampamnn #3?
Not sure exactly how I'd rank them, but certainly would not have even one of them in the top 5.