It's always interesting to see East Africans doing so well. Even with technology like advances in shoes and diet/training, genetics is still a huge factor.
Also it must be an crazy feeling to be Kejelcha, the guy who came in 2nd place. It would have been a world record, except for Sawe!
Not necessarily genetic. They run a lot, at altitude, from childhood
It was his first marathon, so he is probably thinking next time he will be the one to break the record.
Is it actually allowed to suggest that some races are better than others in some areas?