Just one more point. The only blogger I have read that is comparable to Matt in terms of being able to write incredibly frequently while maintaining a high bar for quality was Andrew Sullivan at the height of the Daily Dish.

Having said that, comparing the two is instructive. Andrew is the more gifted writer, and his abillity to speak personally and from the heart takes his writing at times to a height that I don't think Matt has ever reached. But Andrew is also all over the place depending on his mood, gets things genuinely wrong in a way that Matt does not, and ended up having to retire from regular writing for a long time (and now writes far less frequently with more vacations from ever) because he couldn't sustain that pace. And yet Matt keeps going year after year after year without the quality of his work ever faltering. It really is impressive.