I found mention of this article on the IAAF site and, once contacted, they wrote right back sending a copy (amazing service - thanks, IAAF!). It is a discussion paper about the possibility of moving the dec to a single day format. I definitely support exploring this and would love to hear your opinions on it.
A few years ago I did a dec in training in the course of 2.5hrs. It was not a strong performance (and the 400 to 110h was torture, as expected) but it showed me what was possible.
I later found the article online. Here's the link:
http://219.242.208.2/pub/irdc/docs/201405081100565... Let me know your thoughts.