Salmond should rightly have been savaged by the media for repeated seemingly untrue claims he has made and the allegations of bullying, but he has certainly not been by the BBC, they've been fawning over him in half the interviews I've seen. Every claim he has made about EU membership and currency has been rebutted by everyone else involved. He even implied the Queen supported Scottish independence, which is a low thing to do to someone who isn't really able to come out and express her true opinions on the matter.
Plus the study you cited shows 18-24 voted against independence, along with all those 55+. It was only really the 16-17 and 25-34 groups who voted strongly in favour of independence.