THanks for the suggestion! It's an interview with Jan Heine from Bicycle Quarterly! I had read his research on tire width on his blog, "Off The Beaten Path"

But this was even better as it also touched on other research that builds on his. Plus I had never heard him speak before. It made for a nice ride home (although I still have 20 minutes to go on the podcast.

The first 6 miles of my uphill ride home my average speed was 14.1mph which is 3mph over my normal speed. But I can't credit the tires; I had a 15mph tail wind. As soon as I turned east I lost the boost and my speed dropped back down to where I expected. But for a while there I felt like superman!

After listening to the podcast I may experiment with dropping the tire pressure.