It's all opinionated. No one really knows for sure how the Hyuuga or Uzumaki genes effected him (at least not in terms of KKG).
He's a Prodigy/Genius, one who unconsciously applied an elemental nature to his Rasengan. Minato and Kakashi could do neither, and his own father who did the same, relied on clones for most of the training and to use the technique. Boruto still did this with no training (as in learning the applications of nature chakra inside of a Rasengan) and he uses no clones to make his Vanishing Rasengan.
He learned the Shadow Clone Jutsu without any training, plus he could utilize three elemental natures before his Chunin Exams.
I don't think this sort of talent manifested itself from just being Naruto's son, because obviously in comparison to Sarada whose also the offspring of a legendary hero, the talent level isn't comparable so far.
I think natural talent is high due to Boruto being genetically linked to two clan's whom are related to Rikudou. It's just a theory so keep your pants on.