There was an article about accuracy of pollsters and Rasmussen was at the top. So look at that...Romney +2 :)
In 2008, two pollsters tied for being most accurate regarding the presidential election: Rasmussen and Pew.
Here is a rundown in PDF:
You’re looking at the outdated, invalid Fordham “Initial Report” which was compiled in the hours following the 2008 election, before all ballots had been tallied. It’s based on an ESTIMATE of a 6.15 point Obama lead. That estimate turned out to be wrong. Obama, in fact, won by 7.28 percent.
Fordham later released a complete analysis based on the official popular vote outcome. Eight pollsters were more accurate than Rasmussen. This final report has been available since 2009, but conservatives keep trotting out the old, flawed “Initial Report.”
The FINAL Fordham report: http://www.fordham.edu/images/academics/graduate_schools/gsas/elections_and_campaign_/2008%20poll%20accuracy%20panagopoulos.pdf