What puzzles me is that there has been extremely little improvement to Siri since the first introduction 2.5 (!) years ago - at least, none that I have noticed. That is a long time for there to not be major updates or to release her from beta.

I would have expected/hoped that it would be possible to simply silently improve the server-side algorithms because of all the data being sent in and analysed. But so far it's been a big disappointment. Google Now is far better and more useful.