1359 here, Prestige
The best data is the staff on the ground. Many here have asked and been told various dates and they all seem to align up
There is no doubt some horse trading going on to decide how many members at each level there will be against the cost of the lounge access at outstations and the free upgrades
I had a monster point earn in Dec 15/Jan 16 enough to earn Gold status in less than 8 weeks all back in Y, so they better sort this out soon or else I might fall off a cliff status wise