Thing is that Samsung/T-mobile released the OTA on Friday 11/4/16, so for all instances they released the latest Security patch at the moment, so it's weird for me that Samsung may release an OTA for a carrier branded phone even earlier than Google themselves.
Only thing I can add is that reading over XDA it seems that there is a policy I didn't know and I can't verify it's true that Google just release Security Updates the first Monday of each month, so today being the first Monday of the month is the reason that they hadn't release it until today, and yes, it seems that there is still no OTA update yet but the Full Images and OTA images have been posted today for those that want to sideload it.