Updated January 23, 2011 at 1:30 pm: By a landslide vote of 21 to 8, non-threaded comments wins. I have a clear mandate to change things back to the era before those latte-sipping threaded comment advocates took control of this site, and I will implement the change as soon as possible. Thanks for participating in the poll.
It is clear from the different way in which some of the mobile device interfaces work that there is an underlying ability to request comments in threaded or unthreaded format. I will dig around in Word Press to see if this is something that can be made optional.
[Original post from January 11 below]