FranticFish - 6:54 am on May 16, 2013 (gmt 0)
Thanks Lucy, I've read those links, and a bit more around the web, and from what I can see this is a little like robots.txt - no-one is under any obligation (yet) to honour a DNT request.
I still can't find any information about whether Google Analytics honours DNT. There is a browser plugin to opt out of Analytics: https://tools.google.com/dlpage/gaoptout - but that's all I can find. No announcement either way gives me the feeling that they're keeping quiet on this because they won't (honour it).