I knew a girl that was always a lot taller than everyone since that age too. In the same class from Kindergarten to uh, 7th or 8th grade? Wouldn't be surprised if people mistook her for being older than she was like this. Didn't develop my taller girl interest until at least a few years after the last time I even saw her. It'd feel like quite a wasted opportunity in hindsight if that entire age range wasn't pretty much pointless for dating and such.