MWeston said on the 19th:
Oh, and second wave production PCBs (3895) were ordered on Sept. 30 just to get in the queue. We knew they wouldn't be starting until after the Chinese holiday anyway which is how it went down but we wanted our place in line. That gave us time to resubmit modified files if we had to before they did anything, but not lose our place. The boards should be deep into formatting and CAM inspection by now (19th) and perhaps already into the etching stage of inner layers.
Source
I don't know where that puts us now, but it's only been ten days. And I don't think they were going to launch straight into full speed production - I'm basing this on pretty old info, but I believe they will do mini-batches, starting off small and ramping up as they go.