-His mile PR is 3:59.99 from a year at Dartmouth where he decided he was done with running, and wanted to just get sub-4 before he hung up the spikes. He's never run an open mile since but he recently time-trialed a 3:54 with two Dartmouth runners pacing.
-He does pretty much no core work. He attributes this to the fact that he has plenty of core work from when he was a nordic skier, but I think the more important point that he tiptoed around (because of the casual-runner audience) is that core work is useless in distance running.
-He emphasized that he has a very normal diet, only drinking water and coffee (no sports drinks), and only eating real food. I'm a pessimist in that I assume that all pro runners are more or less on something, but at the same time from his demeanor and sincerity I could see him being truly clean.
-He avoids shoes with any sort of stability, including neutral shoes that have any sort of posting to add support. Instead he keeps his feet strong with exercises.
Hopefully something here is interesting to someone.