>PS: I don´t think that having a private education plays a part in artistic output.
I went to private school for my first few years at school, but it wasn't for long. What they generally say is that people who do go there tend to mingle with more powerful people and can end up in a position (be it work or creatively) not on their artistic or other merits but by pulling a few strings and calling a few old chums.
It's a huge problem in the UK music world. James Blunt, Coldplay etc.