Frankly, I can't see how anybody who's read Intrigues can think he's "winging it" at this point, but if your primary expectation out of the series is the advancement of the "Haruhi x Kyon" plot and the "WTF Are Haruhi's Powers About" plot, I can understand the disappointment. I still think most people are happy with just a tease here and there.
I think seeing 3 months as an
outside guess may be a little optimistic. You've all got to remember that the majority of Baka-Tsuki's translators translate from Chinese, and Chinese translations don't exist yet. In fact, I think there's only two, at the moment, that can translate from Japanese. GDsMDDLFNGR and BaKaFiSh. They're both great translators, but I understand it's a pretty long book, and these guys do have lives. I could see 3 months as a minimum, but I'd love to be proven wrong.
If anybody wants to head over and offer some help, there's a
thread on the Baka-Tsuki forum currently running about how many translators they've got (just the two above, so far), and the instructions for registering as a translator is on
the main project page, toward the bottom, right above the listing of the editors. Ganbatte!