Cancelled my 512 12.9 Silver order with BB, and just ordered the same on AT&T. BB order was supposed to be ready for in-store pickup yesterday but then got an email saying it may not be in until 12/13. AT&T says delivery date 11/16 - 11/20. Wanted Space Gray but Silver is fine, it’ll be in the new ASK anyway. Won’t see the back.
I spoke to reps at 2 stores in Austin that had the silver 512 in stock. No waiting. You may want to call your local store and see what they have rather than waiting. You may get lucky.