http://www.huffingtonpost.com/2012/11/08/best-pollster-2012_n_2095211.html?utm_hp_ref=politics
just as we said. persistent rightwards lean from the most prolific national pollsters made the contest seem closer than it was. gravis, rasmussen, mason-dixon, gallup, purple strategies, arg. a rogue's gallery using medieval tools.
and then they bunched at the end to make themselves seem more reasonable. which suggests they knew what they were up to all along.