All the adults certainly were, but what about the students? Draco was the same before Harry started corrupting him, Ron's still an idiot, Neville is still a Hufflepuff, etc. Maybe Fred and George are a bit more awesome, and Zabini is an entirely different person, but aside from that Harry's peers seem to have been kept to the same level. If Hermione were a sensible person, she'd probably outclass Harry just as much as she does in canon, and then the story would be Hermione Granger and How She Learned the Methods of Rationality and Became Omnipotent.