Perhaps someone with first hand experience could comment, but I've always been very sceptical about how the data are analysed (especially in view of the very specific wording used in the questions) and what influence the results really have on anything.
I can just see the Minister saying, "Well, we knew that this change would be unpopular so the result isn't that bad, considering. NEM (insert your own favourite topic) will eventually be seen as the norm, so people will get used to it - just like the junior doctors will."