Do you mean to imply that the survey was only for users who opted in to trying the beta? If so, then I think there is an obvious flaw in the data. Users who did not like the new UI most likely opted out of the beta so they would not have to use it, which means only users who like the UI will respond to the survey. It does make sense though to only want users who have used the UI for some time to give feedback on it since they would be the most familiar with it and likely to understand what is good and what needs improving. So now that the new UI has been available to the entire userbase for some time and the knee jerk reactions to it have mostly stopped, wouldn't it make sense to do a survey that is available and advertised to the entire site rather than just the people who participated in the beta? Especially seeing as the UI is now no longer in beta and has been changed since the survey was initially taken
