The absolute "earliest" we've heard any legit shipping updates in the last two years has been late Wednesday afternoon into evening depending which coast you are on. Mark my words there'll be no changes through much of the day tomorrow either.
And you think you've been ticked so far… Wait till you hear other people talking about updates tomorrow night and yours still won't be there by 11 PM. Many won't get theirs till 5 AM Thursday morning.
That's very true. Last few times I pre-ordered through AT&T, 2 shipment notifications came very late Wednesday night and the other Thursday morning. I wouldn't even be surprised to get word on launch day!