While I was pre ordering mine on 9/9 at precisely 3:05AM, I was also in a live chat with someone from customer service.
She instructed me to log out of my account, select my device ( 128GB Jet Black 7 plus ) and then log back in towards the end.
It seemed to work, I'm getting mine on 9/23. According to her, Verizon will not be shipping any jet black 7 plus's on 9/16, they simply just don't have any * She says *. I asked her if I would have done it any quicker would I have gotten mine on 9/16 and that was her response. She also said that most stores will not be getting any in stock either since supply is extremely limited.
With my experience though ( I always purchase every iPhone that comes out, through pre orders every year ) Verizon likes to give them selves some comfort room. It'll say 10/7 for example, but you'll end up getting it on 10/2.
So for us that shows 9/23 ( first wave of shipments according to them ) we might get ours a little sooner.
Hope this helps !
Bigglesworth out.