Spoiler: ehm... "soon"... like... really soon... like... If everything goes as planned, I'll be able to give you the news next week (crossing fingers, worshipping the devs, the QA, the engeneers and all the staff that's responsible for that)
Because they don't depend on anything from NCWest to get the update, it comes from Korea not from NCWest, there they have 2 teams, the live server (dunno if it's shared for classic) and the overseas territories, when the overseas team is ready they are sending updates and RU got it faster than NCWest
There might be some official info regarding update and some other events this Tuesday if I'm not wrong