Originally Posted by
Pascal
You not learning how to play from leveling is probably not very concrete evidence that no one ever learns through leveling. I learned quite a few things that ended up being important while I was leveling, even my first character - a hunter, one of them being that if the mob starts running towards you, hit feign death. There are hunters that still don't know that, but I learned that while leveling. Some people are bad learners.
I have an incredibly easy time playing a spec that I leveled as when I play an alt, but if I respecc it takes a lot of research and getting used to. Usually when I look up how to play a specc that I leveled as, I was already doing it right.
Of course, me learning through leveling up is also not definitive proof, but at any rate we have established that some people do learn and some people don't.