I disagree with nothing you've said here!
... even the not serious part.
I remember watching a panel that included Joe, someone who had worked at Disney and transitioned over as a lead at Universal Creative (I should remember his name but I don't) and someone just a part of Universal Creative and Joe's compliment to the Universal team was their ability to build and open things quickly.
It was funny to watch because the way he expressed it, it seemed like such a foreign idea to him that such a thing was even possible.
For his part, I'm sure the speed his projects happened were a combination of his process and to an even larger degree, the roadblocks, pitfalls and detours that are a part of navigating the modern Disney workplace culture to get anything substantial done but it was funny because if he'd said it in any other way it'd have come across as a backhanded compliment but it was an acknowledgment that there's no way Disney could have done what Universal did with Harry Potter within the budget or timeline they did it.