Yes, I realize menu prices have increased dramatically over that same period, but the tip percentage hasn't.
I agree with everything you said but just wanted to point out that menu prices haven't risen as dramatically as people think. An original McDonalds cheeseburger in 1955 cost 19 cents. Simply adjusted for inflation this same burger should cost $1.47. However, McDonalds currently features a DOUBLE cheeseburger on thier value menu for $1 - 32% below the inflation adjusted price for the single burger price. Now. before someone starts in, I'm not crying poor McDonalds - they obviously are one of the world's most successful businesses and know how to manager their costs - but the net result to the consumer is far more buying power in their restaurants in 2008 than in 1955. Because of their captive audience Disney is better able to keep pace with inflation in their restaurants which only heightens their disparity with outside restaurants.