I too was under the impression he was super chill and nice. I remember watching an interview with him and his mom and I never once got the vibe that he had an ego. It seemed like they were pretty close since she was driving him to the ski hills everyday to practice when he was too young to drive.
Have people that are saying he's cocky and rude actually met him or are just saying that based on impression? Don't ruin a kid's reputation with rumors unless you know it to be 100% true.