I don't get how people can possibly rate Nibali as highly as Contador and Froome as far as GTs are concerned. Yes he's the most versatile of the 3, and given his showing on the cobbles in the Tour last year, I can see him giving a couple of cracks at Flanders later in his career. However, realistically, all 3 of his GT wins were against weak opposition, as pointed out by a few already. There's no way Nibali would have stayed ahead of Froome and Contador in last year's Tour, even with a 2 or 3 minute lead due to the cobbles. Contador's palmares far exceed Nibali's and although Froome's palmares are relatively modest with just 1 GT, it's fair to say that someone who can go mano a mano with Contador at his peak is undoubtedly an incredible cyclist. Simply, Nibali could never gain time on Froome or Contador unless there's a wet descent, which is why I would rate him below Quintana too personally