Mana, that is
exactly how my DD has always been. Precisely.
We've also heard the kind of awed "She seems so
normal" asides from other people. Then again, this is usually followed with "until I catch myself talking to her like she's a peer, and I realize... heyyyyyy, wait a minute..." We started hearing things like this from my work colleagues and my DH's when she was about three, and those comments haven't ever really stopped.
They mostly mean the "normal" comment as a compliment on our parenting, I suspect. They attribute it to us treating her "like a normal kid" and not hothousing excessively, which is true. Which-- I know, I know, that really isn't where quirkiness comes from. I know.

But they don't, and I've more or less given up explaining that she just seems to have come with the infinite social flexibility hardware already installed at birth. LOL.