I'm much more interested in the web platform here (versionista) than I am the particular content being tracked - this looks like a great tool with a ton of uses.
He did not revise his technology positions. He made his webpage smaller and easier to read for the mainstream. Changing your site does not mean you changed your opinion.
From what I can tell, there isn't a huge change in the actual content of the message.<p>It's been simplified and summarized, with a lot of the statistics removed, but the overall message remains intact. Also, the original document is available as a PDF at the bottom of the page, with full detail.<p>Most likely, they streamlined the page to provide a simpler reading experience for the non-technical voters. For the more tech-savvy voters who want details, they left the full white paper available.