I'm thinking Jan/Feb time frame depending on device. For the record, Samsung is not the last to send out OS updates. For WiFi only devices it rolls out updates by device and region, so some devices will get it before others. For LTE devices, the carriers have a say in the matter, since they own their respective networks. Carriers are really only worried about network security and performance. If the update negatively affects either of those, then the network in question will not release the update until the fixes are made.