I actually like Siri and often get good results, unlike most people on here it seems.
However, I wish Siri had offline support. When I'm underground on the subway, Siri doesn't work at all. When I'm in a low-coverage 3G area, or worse 2G, Siri sometimes fails or takes way too long. Obviously I don't expect Siri to look up info for me offline, but surely it can dial a number or send a text or add something to my reminders app without an internet connection.
I believe Android has this, it can handle dictation and simple commands offline. I wish Siri could too.
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Do you have Siri set to Dutch or something?