Not me, I get a lot of work done in bed, probably more than half. The easy chair is not a productive setting, I grant you. Lately I prefer to pick up the kindle or tablet for a short break from the desk, and this is probably more conducive to work than switching from "getting things done" to "browsing HN/Twitter" on the same machine.

I use a sit/stand desk but barely ever sit at it, so fifteen minutes of down time here and there helps.