Fill the bloody survey in and be honest.
If it's not confidential well they'll know exactly how you feel. Does that scare you?
If they ignore the results, big deal.
If they massage the results, big deal
If it's a con, big deal.
If it's for real, big deal.
Just fill the bloody thing in. Not filling in a survey just says you don't care, and if you don't care, stop wingeing on this forum.