Dear Aunt TUAW,
It's funny how we can write a book to learn to speak to Siri but there's no vocal "quit" command LOL!
Your loving nephew,
Dig
Dear Dig,
Of course there is a verbal command. It sounds like this:
"Honey, press the Home button. It's the round one at the bottom of the screen."
Kidding aside, it looks like Apple meant to put in a Quit command but didn't get it completed on time. See the screen shot that follows.
Other Siri responses to "Quit" include, "Did I say something wrong? If you really want me