That would be true if any those points were actually shown, and not said. He's said to be brilliant, but is proven not to be through his actions. Likewise, his fighting ability is said to be brilliant, but from what I can tell, he's only actually won one fight against a high school bully. Sports? When exactly? He gets tripped in the game show, and does nothing about it, but he sister not only wins, but also gets revenge against John Jr. Saying your character is this and that is meaningless, when he's shown consistently to not to be any of those things. Potential does not equate to actual ability.