Have you seen Prime Air's very first, fully autonomous customer delivery? On December 7, 2016, a gentleman in England placed an order which was delivered to a little landing spot in his yard. The amount of time from click to receipt of order? Thirteen minutes.
Buts as the video explains, that we are testing with relatively nearby (and smaller) fulfillment facilities.
You may have noticed that the drone design has changed. Since the purpose of a private beta is to test, learn, and innovate (or re-innovate), there may be more changes to come.
Here's a bit of trivia: What was in the first Prime Air drone delivery? A Fire TV and a bag of popcorn.