That´s going to be interesting... I see clear parallels to spring 2013:
Sky´s top classics riders chose to skip Paris-Nice and Tirreno in order to train in altitude, as the only serious contenders choosing this approach.
Now Quintana is the only of the estimated Tour contenders who chose altitude over Dauphiné and Suisse.
The surprising thing is that he chose this approach early in his career. Mostly, you try new ways as soon as you reached a point you felt something different is needed to further develop. But his career still might be very long, so he might benefit from having made this experience quite early.
End of July, we´ll know how and if it has worked. It´s brave, anyways, and respect to Unzue and Movistar´s direction for allowing him to prepare this way.