Yes, this is common knowledge, is true, and has been discussed here quite a bit, a while back. Not much goes on in the AA world that isn't discussed here. I'm pretty good with the Search tool, and I couldn't quickly come up with good search terms to come up with the thread that I know is out there.

Edited to add: Well, as I was posting this sggolf did come up with good search terms .

Cheers.