While everything that I've read states that there will be only 14 episodes, I've yet to see confirmation from an official source (not there isn't one, I just haven't seen it).
Episode 9 Spoilers (perhaps):
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However, after watching this, the 14th episode chronologically, it does somehow feel to be accurate.
So if that was supposed to be the final episode chronologically, I'll be slightly disappointed, seeing how the series would end without developing a stronger relationship between Kyon and Haruhi. Not to mention revealing the owner of the second cardigan (although I suspect Yuki).
The episode did seem to have a "final" feel to it, however it wouldn't surprise me in the least if, in the preview at the end of the second to last episode (13), Haruhi stated that the next episode would be number 15 and took place after 14. That wouldn't seem to strange considering the nature of the show, but I know it's just wishful thinking on my part.
Really, though, if this was this final episode, I don't think that it ended that badly at all.