Yes, I think it can apply to *anything*.
You don't know how many students answered the survey, or what parts of student society they surveyed.
Its possible the survey was done of students that formed part of the student Law Soc for example, and so who may have felt involved and valued and therefore very satisfied with their degree, as opposed to the students who had problems with the university, found the library hours inconvenient and tutors difficult to get in contact with.
I'm not saying these surveys, rankings, etc., should be disregarded completely, but that they should be held as an indicator or guideline.
Think of it in terms of holiday destinations - just because your friend loved somewhere for X, Y and Z reasons, doesn't mean you hold the same values and will also love it.
Obviously grade statistics will be hugely important, but even these can be manipulated unfortunately - for example, my brother wasn't entered for one of his A-Levels because he was expected to fail and the school wouldn't allow him to trash their statistics. So the schools' statistics are not truely reflective of what their students are, or are not, achieving.
Anything can be interpreted to suit a need or objective, and anything can be manipulated for the same reasons ... surely as a wannabe lawyer you should know that lol??!!