I'm not sure this applies when dealing with large-scale shipping operations, though it's certainly possible that they won't go out until tomorrow morning.
I preordered mine on Thursday afternoon. Almost immediately I saw the pre-charge authorization post to my Amex, and as of 7:05pm CST today (Monday) my card still shows only the authorization. My order status does not show a tracking number, though it is listed as "shipped." I have not received an email other than my original order confirmation.
I hope that my order does go through, but until I see a tracking number (or the delivery guy) I'm not 100% convinced. I did pay for overnight, as I didn't stop to read the fine printer regarding free 2-day because I was rushing to try to use the coupon code before it got yanked.
Perhaps tomorrow morning I'll know more, for better or worse.