We just booked Hoop-Dee-Doo, and the language on the website still says drinks are unlimited. However, I agree with the poster above: with all the food that is available and the brisk pace of the food service and show, more than 2 drinks per person would be a challenge to order/receive and to drink in the time you have.
Is it possible that the guests who said there was a 2-drink limit were, perhaps, told this as a "little white lie" because their server was concerned they'd already been overserved?