Well, not going long ago, Atelier Annie released yesterday was announced in September and this one at hand looks to be bigger deal.
I don't like those announcements of games maybe coming in 2012 (hi Square-Enix), but you know, there has to be a point in between. I don't mean it for every title, when its about ports and such it doesn't make sense to try to build hype for +6 months. Anyway right now (for japanese developers), it seems you either have an announced project stuck for years in the making or you're hiding it until 3 months to release. Or they are just playing around not making games