When sifting through the long tail of news and analysis content on the web, you can find your expectations diminished in the face of a huge amount of mediocre material. I recently did a clean out of my RSS feeds because I realised that several of them had become more of an obligation rather than a source of good information.
And then, as has just happened to me, occasionally you find a diamond. In this case, not just a shiny rock, but a real diamond.