Dropping like a brick before overtaking a bunch of guys is something he's done numerous times. Twice in the Giro last year, Lombardia last year. It's like he can't stay above threshold for much longer than 10 minutes
Yea, well, the way he came into the Giro I don't think allows for drawing a definitive conclusion. And the rest of last year, not always mind you, was conditioned by his lack of proper preparation due to the massive injury he sustained.
Granted, he also has not shown being able to stay above threshold for a sufficient amount of time to compete against the very best. It may be for these very reasons, however, that he I think was also psychologically defeated on the first Carpegna. I still say it remains to be seen if he can or cannot do it in the future. He needs a healthy year, without injury, and a solid Vuelta, then we shall have a better idea me thinks.