I feel like this analysis has to be missing some countries if the USA men come in at 5th in 2:15:35. Where are Eritrea and South Africa, for example?
Either that? Or Rupp's time really help skew the average.
I looked at the IAAF results for this year and it seems that Eritrea and South Africa are quite underwhelming so far this year. I wonder how much South African talent focuses on the Two Oceans and Comrades ultramarathons, rather than the marathon distance.
Also, those North Koreans sure do show up at the Pyongyang Marathon.