Thank you very much for your comments! It's funny, given all the rhetoric around 'feedback' in our society, just how hard good feedback is to come by. When I wrote this paper over 3 months I told myself that my goal was to get 3 people to think hard about the details of what I'm doing. Based on this thread I'd say I've gotten on the scoreboard there.
You're welcome! And thank you for the thought-provoking paper and continued discussion. I was a little worried when I posted the first round of comments, after I saw how long they turned out to be.