Not to take anything away from Massa, who seemed to have pace to spare throughout the race, but I wonder if the spec he ran actually worked better thant Alonso's.
Moreover, I was very surprised that Ferrari stayed in their garage for so long in P3. I know the track was changing, warming up etc. but for a team who previously relied so heavily on physical testing at race tracks, you'd imagine they'd use every chance they got at doing some running. Surely they can get more useful data from circulating on a cold Austin track than from running in a straight line, for example?