Hmmm...when we were there in January, DH actually did a survey in person while standing around waiting for us at Animal Kingdom. They took his email addy and said they would be sending him another survey, but as far as I know he hasn't received anything yet. The one he did in person was about the DVC (how interested would you be in it, that sort of thing if I remember). My brother is a DVC member, but we aren't.
I'll have to tell DH to keep an eye out for anything.
We got a postcard after our stay last year at BWV, but I don't think we ever got around to doing the survey.