good pointFWIW, isn't the summer 2017 date an extrapolation? I think -- though I can't read the article myself because it's behind a paywall -- that George K is actually quoted as saying that the project would start by the end of 2013 and take "3 years to build" or something like that. The writer of the article then took the liberty of projecting to summer 2017.
I'm not saying that date is going to be wrong, but I'm not sure that George or anyone from Disney explicitely said that was the estimated delivery date.