Quote from cgroupman:
As I mentioned in another thread, these so called polls only use land phone lines, and most voters under 35 don't even have a land line, only the older group. I think the Intrade numbers are more accurate, perhaps 60+ to 35 or so. It will be interesting next time around when they start using real polls with cell phones and other media.
http://pewresearch.org/pubs/515/polling-cell-only-problem
c
Intrade numbers aren't a poll. It's the value of a par payoff if either Obama or McCain wins. Meaning: Bettors believe there's a 60% chance Obama becomes President.

