I'm in Seattle and while I don't go out every night I usually find myself in some pretty crowded spots during my commute or those couple of times I do go out in a week. Yet strangely I have not encountered another person using a PV.
same thing here however one of my converts was a SE user now happily uses a 901No, only ones I see are the ones I converted or folks from here when we have a meetup. Then again, I don't get out much, lol.
Only the two that I've introduced to the product but they have also shared with their families and friends. One step at a time. Cheers.
As for encountering others - I encountered two people at the Wisconsin State Fair who owned ecigs.