as I mentioned on the webinar, there is no clear definition of "mobile". It is, in effect, whatever you want it to be.
Some define it based on screen size (in which case, it's unclear if a 7" tablet is mobile, or a 5" or a 10"?)
Some define it based on the interface (touch versus mouse).
Clearly the iPad is "mobile" in the sense that it is touch based, and well, it travels around easily enough. On the other hand it has a screen large enough to be similar to some desktops.
Question is - why do you care? The pages work on iPad, so why is this an issue?
cheers
Bruce