Do you think that if more people either postpone or cancel their WDW trips in favor of other parks that the decrease would be noticeable? The main reason I ask this is because of large tour groups coming from outside the US. Seems like every year these groups are growing, especially from places like Brazil and other countries in S.A., and just from observations I am assuming its mostly younger adults/teenagers.
I can only guess at this, but I would think that Disney has a huge revenue stream coming in from well established Disney families that do the whole Disney experience, from cruises to DVC to staying at their premium resorts/moderate resorts. If these groups started to cut back, I can only wonder how much it would make them notice. I go to Disney at least once every two years and the demographic keeps changing to younger and might I say rowdier groups of people, which seem to make it less of an enjoyable experience.