From my post on aiaio:
The majority of respondents, 58%, don’t use the mobile Internet at all. And two-fifths of that group doesn’t even have a web-enabled mobile device.
In my everyday life, for each instance I have of “aha! let me look that up on my phone,” I get half as many eye rolls about the fact that my phone came out of my pocket. My ability to access information in an instant can be trumped by an inclination toward, well, not taking out the phone.
Mobile etiquette is a funny thing; I personally err on the side of polite more than progressive, apologizing if my phone comes out mid-conversation. I wonder how much of that is going to drive mobile adoption the next few years, and when or whether it will move from accepted to expected across all social and age classes, as text messaging has.