Johnston's audience is a pretty interesting one, diverse, and across a large spectrum of opinions when it comes to film/digital.
What I take note of, is that the little things David explained, most of which are already widely known in places like APUG, are in fact relevant news on MJ's blog.
Interesting article, David. The demo is remarkable, btw. It's also nice to see something like this that clearly isn't written to challenge, but rather to explain in an informative way. Way to go!
Well, interesting people seem to read and comment on Mike Johnston's blog, so quality is better than quantity, I think. I also talk about film and LF things on the rangefinder forum and the Open Photography Forums.
I also try to infuse good information on RFF. It's such a gear-oriented place, I'm always surprised when I see someone asking questions about developers instead of favourite f-stops or sharpest summicron.