Alcoholic beverages are priced above what you'd find in the neighborhood restaurant or bar, and even above what you'd find on the Disney Magic (after 14 days on the ship I know this), but on the Magic you've paid through the nose for everything else, including your food, and most vacation destinations do charge more than the neighborhood bar does.
However, buying a beer at WDW costs less than buying one at any local sports arena around here. I had a slice of pizza and a coke at the MCI center awhile back and it cost $11!