A small update, I just now got off of the phone with Apple, to ask them about they delays with these new iMac's. He said that he's aware of the delays and that they are mostly caused by an order with a wireless keyboard. My order does not have a wireless keyboard, so he said it really should still be on track with their original ship date that they first quoted me.
Just wanted to share some info directly from the source. (Apple, that is.)
I'll let you know if it actually comes in the expected ship and arrival dates.
I got the same dates as you. I ordered 2 of the 2.8 24inch from the apple government store. I hope they ship on those days too!!