I got a postcard today asking me to participate in an on-line survey.
I just finished it and it was about 15 to 20 minutes. Lots of questions and not just the typical leading questions that you get in the "quickie" surveys at the park.
Lots of questions and some were very pointed about how often and for how long you visit each of the parks.
I would imagine that the results of these surveys may lead to some changes in the AP program.