I have a heavily musical background, and early on I noticed that I had perfect pitch (the ability to tell the pitch of a note upon hearing it, and the ability to sing a pitch out of the blue). I wouldn't say it's a particularly useful skill; and, in fact, it has often been a hindrance.
I initially thought it was just a natural development arising from ear-training, which is something I always did religiously even though I wasn't too big on the practicing. But it turns out it's not particularly common, even among highly skilled musicians.
I do remember reading somewhere, though I can't for the life of me remember where, that perfect pitch is common among those with autism.
Does anyone have perfect pitch? Am I right in assuming it's a common autism trait?