I was told to chat back within 48 hours if the shipment date has not been adjusted to a more accurate date. I did just that and the person who I was chatting with, named Cody, told me that they don't have any information on the availability of the iPhone 6s Pluses. He simply told me that AT&T will start shipping on the 24th, and that there is a possibility that we'll have to wait until October to get our orders in the mail. Still lost in the dark...
I chatted a different person for good measure.
This time, I got this:
"Colton B: Oh, I see. I'm afraid that the demand for the 6s was so intense, that these shipping dates are more than likely correct. I'm extremely sorry for the delay on that, but about more than 5 million units were ordered in the period of 5 minutes, so the stock status was almost immediately depleted and a ton of orders were put on backorder."
This is pretty concerning because every employee seems to have a different response as to why people who placed an order with AT&T for an iPhone 6s Plus have shipment dates for mid October. I'm not even sure what to think at this point.