Jakob went from 3:39 to 3:31 at the age of 17.
Oh but he is white, sorry.
And then "he was maturing", etc.
White = Clean for most Letsrun posters and Katir doesn't even have a white name. So he can't be clean.
What's wrong with you? You don't see a difference between someone improving at 17 and someone else improving at 21 or 22? Anyway I actually think Jakob is a prime candidate to be doping esp. with the history Norway has with cross-country skiing. I want Katir to be clean because I like him but the Spanish also don't have the best reputation for doping.