The classes so far updated, have seen a serious increase in Blue traffic prior to the updates. Hunters have yet to see much detail in that matter (compare to Warriors and Paladins for instance).
But one can also see this as good. When they do the major updates it will most likely mean that they think the classes are close to where they want them, and only polishing remains (positioning of talents etc). I think we can agree that Hunters require a fair bit more than that.
It isn't really unreasonable that Hunters will take a longer time. I can imagine that the change to focus means a lot of basic stuff, not even talents, needs to be extensively tested, and only when that is fluid/right/whatever will they proceed to the more complex stuff.