This is Outside magazine stirring the pot for no good reason. Kilian has proven dozens of times in highly competitive and controlled races that he is a notch above competitors from his generation. Also, the FKT-s he sets are not out of this world, and many of them have been broken since (Kilimanjaro and Aconcagua iirc). Anyone who has used a watch GPS enough times will know that once in a while they will just misbehave and report incorrect coordinates.