Third in l'Avenir this year was Ilan Van Wilder. Who is very comparable to Evenepoel in build, style, skillset. Good ITT'er, good tempoclimber, same height (1m71), +/- same weight (62kg), same age, born only a few miles apart. But every stagerace they competed together as juniors, Evenepoel finished ahead of Van Wilder (and won). Van Wilder was also runner up at Belgian National Championships ITT. Also at the Euro Championships ITT. Behind Evenepoel every time. At this years EC ITT, they both rode the same course. And while Van Wilder made a great debut as a 19 year old at the U23, and made the top 10, Evenepoel won... the elite category (almost 2 minutes faster than Van Wilder's time on a 22km course). You can dance around the bush all you want, but there is no doubt in my mind that had Evenepoel entered Tour de l'Avenir, that he would have won that on one leg. If you have any interest in junior and U23 racing, and you have followed Evenepoel, you would say the same thing. Van Wilder has been regarded as one of the top talents in every age bracket he entered (again proving himself this year as a neo U23 rider), and yet Evenepoel is simply that far ahead.
He is incredibly consistent, won every stagerace as a junior he entered (except the one where he crashed, fell unconscious and lost too much time... yet finished the stage and won the next day). And while the juniors may not say anything about the level he may grow into, the way he dominated every stagerace, does show he's consistent and has no issues with performing a few days in a row.
Questioning his potential as a GC rider, which is undoubtedly there, seems a bit laughable after all what he's accomplished as a junior and in his first year as a pro. That doesn't mean he'll become the GT worldbeater he hopes to be. But he's certainly free to dream. If not him, then who? He only finished a few seconds behind Grossschartner on the MTF in Turkey. He finished only a few seconds behind Dumoulin on the first MTF in Quatar (and ahead a lot of Sivakov, Nibali, Kwiatkowski...). Acting like he has shown nothing that indicates he has potential as a GC rider is simply disingenuous.