I just looked at the time line for my Note7.
The IMEI was updated on my JOD agreement on Monday 8/15. Card was charged $0.00 on 8/16. Received notification from UPS on 8/17 saying I had a package delivering on Thursday 8/18.
I'm thinking since no one has verified that their order was updated with an IMEI yet, we're most likely seeing a similar time line for next week. I wouldn't think they were would start processing the shipments on a Wednesday to have packages delivering into the weekend.
Just my feeling anyways.
So, still probably guessing some get theirs on 4/19 and some on 4/20.