I'd say that statement was pretty accurate Pete. I am basing this on my own life experience and the blue boys and girls I have encountered. I'd say that's how many also view them and many of them also view themselves.
I also agree, at university I recognised that I was incredibly privileged to have grown up where I did, had the parents I had and end up where I was, surrounded by, I'd say, 80-90% white middle class children. The young Tory who we had a little hustings with, was of the opinion that it was all down to application, which although possibly true, is affected by the former. As a result wasn't keen on welfare state and extension of policies promoting social mobility, and yes he did wear colourful blazers.