Our DD7 was identified as gifted and clearly has multiple OEs (emotional, imaginational, and intellectual).
Assuming I can even make this distinction, I believe her brain, considered outside these OE forces, is otherwise normal or slightly above average in its ability to retain, organize and process information.
Sounds like gifted denial to me! And plain ole intellectual OE. I think the ability to organise and take to long term storage can be learned (or taught) and comes with time.
But really, doesn't your DD remember the words to some song you haven't sang since she was a toddler? Or some place she 'couldn't possibly' remember? Or giggle to the punchline of a joke from 3 years ago?
Or is all that behavior so normal for your extended family that you brush it off as 'no big deal?' - that's quite usual, you know.
I know my son used to pop up with those weird memories all the time.
But I like the idea that intellectual OE forces development in certian areas - forces feels like the right word.
((shrugs))
Hope that helps,
Grinity