Sure, and I would expect the exterior to take a while to make it look a lot less like a parking garage, and the GF DVC structure went up much faster (but we all know why that went up so quick), but this garage is moving at an indefensibly glacial pace right now. A parking garage structure is a parking garage structure. "Top of the line" simply means it holds up well in this instance. Would you say the structure they're putting up at Universal for their TMs isn't "top of the line" structurally? I know, size difference, but I really doubt there's a true "need" to pour on site. Universal's main garages appear to be mostly pre-fab, and I'd say they're structurally "top of the line."
Heck, I'm slightly excited for Disney Springs as a whole! I just wish they didn't move slower than a turtle on everything they do that doesn't have a direct revenue stream (i.e. DVC construction), because there's no real reason other than spreading costs out over multiple quarters/years for going that slow.