I don't think Paul is rewriting history. He's been saying these things for over 30 years. He said he was listening to John Cage in the late '60s and had an open mind to more avant garde things. George Martin has acknowledged that. The difference between him and John (in my opinion) is that Paul has typically gone for creating more accessible (read commercial) product and John hooked up with Yoko, and he got off on the fact that you can create 'art' out of anything and applied it to his music, avant garde, music concrete, or however you want to spin it. Hell, he wanted Revolution 9 as an 'A' side of a single.