8/9 with a GM-norm at the age of 13 sounds quite promising. The kid doesn’t come out of nowhere. He has already shown in youth competitions that he is the number one talent in Germany by far. He is working with Leko which means that his openings are already on a very high level. As the rating-underdog he has the advantage that many opponents are playing for a win against him. Right now he can gain Elo by drawing or by the occasional variance, like his victory against the hungarian GM Rapport. Once he becomes the favorite, things will have to be re-evaluated. Keep in mind that the human brain is fully grown around the age of 15, so he has lots of physical upside-potential. In any case, for Germany it’s either him or nobody.