Maybe, but at this point who knows. My memory fails but has there ever been another ride opening that was as weird as this one at USH? We know about technical rehearsals and working kinks but the timing of this one seems a bit off, like Hagrid's.
Why do you think USH is inflating wait times? is it that they want to prepare you mentally for the amount of time you might experience even if it's way less or to discourage a lot of people from lining up on previews?