Actually I think he gained all of his seconds on the climb and on the flat in the last 3km. Sure it was Valverde pulling behind, who is also a good descender, but I think Nibali is a little overrated as a descender. He can't make a difference like Sagan for example (well nobody can). Was nice to see him attack today tho. I was expecting this and I'm looking forward to some crazy attacks in the Alps. He is still exciting to watch. Nibs and Sagan are pure racers.