In reply to Morten Rand-Hendriksen.

As much as we favor statistics from a top level (all the WordCamps scored this...), let's not lose sight of the fact that these surveys should also be uniquely useful for the organizers as well. Surveys should allow the organizers to determine what specific elements of their unique WordCamp were successful, among other uses. So at the very least if there is a "central survey" then some questions need to be highly customizable to be useful for WordCamp organizers who need this data to plan better camps next year. Admittingly, some organizers might not bother with this method so a generic vanilla survey makes sense.

I'm not saying this isn't a bad idea, but if you aren't a WordCamp organizer then you might be missing a few points.