Schmae!
I think the course is progressing rapidly, but not quite as fast as Duolingo is reporting. The Facebook group that was involved in starting the course recently reported it was actually at 40% completion and a previous post indicating a January/February release, https://www.facebook.com/groups/welshduolingo/ which is still very quick progress in comparison to other course that have been in the incubator for far longer 
Flynn