I think that no news just means no news.
The Due took well over year from being officially announced to being on general sale. Technically the software is still in beta another year after that. The wheels at Arduino run pretty slow, and the Zero is in partnership with Atmel, so they are a factor also.
I understand with the Zero there is a new IDE, so I imagine that will be taking a lot of time to get right. But on past trends I would expect it will be late 2015 before we see Zero on general sale.