Most of that is really meaningless.
First, the iPhone and iTouch are both multifunction devices. They are also the hottest multifunction devices out there at the moment.
Second, when people purchase a multifunction device ... especially one that functions as a pda ... they tend to download as many programs as they can get their hot little hands on (I know I do ...). It doesn't mean that they are actually going to use any of them, or that on trying them out they will stick with that format.
There could be iPhone or iTouch owners who also bought (and carry) a Kindle, or a Sony, or whatever dedicated reader they own. I would hate ... really hate ... being limited to a screen that small for reading.
So, they are really comparing apples (pun intended) to oranges, and the whole thing leads to no defensible conclusions.
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