I did the same thing from a SG 6 64gb ordered on 10/12 to the 6 SG 128gb. After my ship date went to 11/24 I got irritated and ordered the 128gb since the ship dates have stuck to 4-7 online as well as with the CSR reps. haven't heard anything, considering a lot of people are changing their orders and having them shipped out on the same night or next morning, with the same shipping time frames online as the 128gb SG 6. Called CSR to see if I could change to overnight shipping from ground since that looks like the trend with everyone who has changed their order and, she said that it couldn't be done because my order was "being processed" I asked for an estimated ship date and she said Nov. 5th, which is 9 DAYS after my reorder.
I hope this 128gb overnight shipping is not a ploy to increase their sales and get more money out of people, it's kind of crazy to me that these phones are having these instantaneous shipping and deliveries out of no where, yet they aren't sending any of these phones to the stores.
I'm giving them two weeks from order date before I cancel everything.