As much as I dislike these two white rappers, it is interesting to note that Zane and Jake Robertson ran ...
13:21 and 27:45 races respectively
... those are almost exactly equivalent.
I remember when Salazar came back from Europe and trained for the NYC marathon for just 7 weeks and won it in 2:09:41. He had run 13:23 and 27:49 in the same week in Europe.
Good for them, even if they lack common sense, they are fast.