de-lurking...
true enough about the barbarian but:
barbarians and raised-by-animals stories have very different literary origins (which is where all roleplaying gets its stories, right?). barbarians owe a lot to robert e howard, whose conan remained a barbarian throughout his life *even tho* he spent most of it living in the 'civilised' world: for howard, being a barbarian is basically an inherent property - so that a barbarian child brought up in candlekeep would remain a barbarian even tho they had never lived as a barbarian (it's related to that whole 'noble savage' thing).
kaspar hauser stories (aka children-raised-by-animals) stories, on the other hand, are very different: the child remains a human even though they think they're a wolf, or whatever - and indeed, unless i'm remembering it incorrectly, there are versions of the kapsar hauser story in which the child eventually forgets its upbringing. [true even for tarzan - at within re howard's work, altho not in hollywood's.] child-raised-by-animals is, in literature, a leant identity, not an innate one: the child remain human (or elven, etc, in the roleplaying world) and so may well lose any abilities they were taught by animals if they associated with humans too much. hence, child-raised-by-animals-then gorian wouldnt be feralan, but might be barbarian (if its parents were barbarian, that is).
exec summary: barbarians = within roleplaying genre; feralans = outside roleplaying genre (altho i'd enjoy playing one)