@cicerone imposter,
I have no data, C.I., but I think it is the other way around regarding cell phones. More young people, minorities and/or urban dwellers (liberals?) have them vs older people in rural areas (conservatives?).
Nate Silver was on NPR last week talking about the challenges of polling in the cell phone age. I, as I have said before, am not as big a fan of his. Irishk perhaps is. I concede he is very bright.
Anyway, he claims that pollsters are able to overcome the cell phone thing. It used to be, as I understand it, that cell phone users were charged for incoming calls. If that was ever true, it is no longer the case. And, with robo-dialing, pollsters can hit cell phones.
I readily admit I am way over my head on this.