I just got charged the tax on my iPhone 7 Plus, but I'm not sure if it's the Jet Black or the matte Black because I ordered one of each (one for me and one for wife). The regular Black has a delivery date of Sep 27-29 and the Jet Black has a delivery date of Sep 26-Oct 4. Both are 256GB models, so now I'm on pins and needles waiting to see which one it is. I'm hoping it's the Jet Black because I think that's the one I'm going to take (wife didn't care which one she got, so I figured I'd order one of each and pick for myself, LOL).
Woo hoo!
My email confirmations were at XX:11am for both models.
I did NOT pay for expedited shipping, so I think there goes the theory that expedited shipping actually makes a difference (like we veterans already told you).
EDIT: It is my regular Black 256gb Plus model that is shipping first.... just showed up as Preparing to Ship. Nothing on my Jet Black.