I was
just reading a study about this phenomenon!
Apparently, back in the eighties, some researchers took a group of men who had already been scheduled for a very unpleasant, invasive, painful medical procedure. The men were randomly assigned to two groups. The first group were given the procedure in as time efficient a manner possible. The second group were given the same procedure, but afterwards the medical equipment was left in place for a period of time, extending the procedure in a relatively painless way.
Each man was asked to rate his pain on a 1-10 scale, every minute or so.
The first group rated their pain very high, and afterward recalled the procedure as being extremely painful. The second group initially rated their pain very high, but during the waiting period rated their pain as much less. When they were asked to rate the overall experience afterward, they recalled it as being considerably less painful than the first group and were more positive about the procedure.
Apparently, your last impression of anything, whether it's a movie, a theme park, a cast member, or a medical procedure, is REALLY important in influencing your overall opinion of things.
Funny thing, too... when the results were explained to a new group of men, and they were given a choice between a long or a short procedure, they still all chose the short procedure!
I think our opinion of the parks sometimes works like this. If our day ended magically, then the whole day was magical. If our day ended on a sour note, then the whole day was kind of meh. And it's all regardless of what actually happened that day.
One of the biggest lessons Disney has taught us is, "Always give them as many chances as necessary to make it right." Talk to customer service. Call back. Be persistent. Make that happy ending happen! You'll be happier for it, even if it takes longer.