When I said "I'm tired" it responded with "Nothing wrong with being tired or sleepy." That sounds like the Apple work ethic to me.
From AllThingsD:
What's the best phone?
Wait... there are other phones?
I got "the one you're holding."
Ask it to help you hide a dead body.
Me: How old am I?
Siri: I do not know. Ive been wondering that myself.