I got my US Mint shipping email at 1:23pm Pacific today 9/20 (though USPS still hasn't received my package as of yet). I got my 1st email "Order Acknowledgement" at 9:12am Pacific on 9/13. Got the 2nd email "order is confirmed" at 12:06pm Pacific on 9/13. My order number is USM11471XXX.
I wasn't the quickest at ordering, but wasn't that slow!
At least we are hearing from some that they are being shipped. It's better than last Friday when we didn't hear anything. My brother paid for next day shipping and got his on Thursday, I tried to sell my brothers the best offer (not EBay) was $300, I would have taken it but he wants more.