I'm not claiming to be a prediction master like Everko but in my opinion if he was a future slam winner he would probably have atleast played a slam QF by now. He'll probably win a masters title and get top 5 ranking at some point in his career but not much more.
None of the young guns have done much so far. He has probably done the best. Tomug made Wimby quarters but what has he done outside of that?