I think Quintana was actually quite unlucky not to gain time on Thomas yesterday. TJV and Pog clearly weren't interested in gaining time on Thomas, else they would have pushed on right after the final summit and they might have gained a lot.
Pog is not interested to distance Thomas at all while Vinge has no interest to cooperate with Pog. That's why Thomas is still so close to Pog and can even snatch the 2nd place if Pog (who doesn't care about anything except victory) risks too much.