So.. first of all, I think you and most here forgot that Contador made the difference on the penultimate climb by himself - Purito and Valverde couldn't even bridge the gap.
Then once he rejoined the breakaway, he was taking pulls with Paulinho - then he was the one launched another attack on the flat, which only Tiralongo could respond - then went on for a solo ride for the last 13.5 KM.
In the meantime, Valverde didn't move an inch from Purito's wheel who did all of the work in the flat, then when he attacked him, he had Quintana and Intxausti who did 90% of the work until the 3 kms to go.
So Valverde is still the one who rode alone more than Contador?