I placed my order around 11:57 PM PST on the 11th, got a confirmation email about 2:30 AM on the 12th, and got shipping notification in the early hours of the 13th. I have been refreshing the FedEx tracking a few times a day just waiting to see it start to move from the Memphis hub. Delivery is scheduled for Friday the 19th.
I have already ordered two cases to try for my Space Grey iPhone 6 64GB, see them here: https://forums.macrumors.com/posts/19712497/
Coming from a Samsung Galaxy S3, iPhone 5 (briefly), HTC Thunderbolt, and Palm Pre.
With no updates to the FedEx tracking since the 13th, this morning there is a new entry for "Shipment information sent to FedEx." The Estimated Delivery Date is still set for tomorrow on 9/19.