According to Nate Silver, PPP not even close to being the best pollster of 2012

[SUSAN CRUSHBONE]

PPP has a bias of 1.6 points. For Republicans.

J.J., does this claim stand uncontested, or will you debunk it in favor of the 3 point Dem bias you documented?

On the flip side a lot of Dems here were busting WAA, and it turns out they had no statistical bias at all (D+0.1).

WAA had polls that were far off in both directions. I don't think anyone denied this.

[Miles]

Rasmussen's Republican lean from 2010 to 2012 was remarkably consistent. In 2010, it had a average bias of 3.8, now its 3.7.

[True Federalist (진정한 연방 주의자)]

PPP has a bias of 1.6 points. For Republicans.

J.J., does this claim stand uncontested, or will you debunk it in favor of the 3 point Dem bias you documented?

On the flip side a lot of Dems here were busting WAA, and it turns out they had no statistical bias at all (D+0.1).

WAA had polls that were far off in both directions. I don't think anyone denied this.

I wasn't one busting WAA for its bias, but because of its high variance. Despite having a very low bias, their error rate was greater than the median.

[muon2]

PPP has a bias of 1.6 points. For Republicans.

J.J., does this claim stand uncontested, or will you debunk it in favor of the 3 point Dem bias you documented?

On the flip side a lot of Dems here were busting WAA, and it turns out they had no statistical bias at all (D+0.1).

WAA had polls that were far off in both directions. I don't think anyone denied this.

I wasn't one busting WAA for its bias, but because of its high variance. Despite having a very low bias, their error rate was greater than the median.

You weren't, but there were Dem leaners who wrote off their results when they were too much to the R side as the work of a GOP-leaning pollster. Both DK and DU pushed this on their web sites as well. It is true their roots are as pollster for the Illinois Manufacturing Association, but the bias analysis by 538 should at least discount the notion that their origin leads to systematic bias.

[minionofmidas]

There should be 1 examination using only the final polls from each pollster and those should not be older than 1 week before election day.

Another examination should focus how the different pollsters did before that 1 week timespan.

This.

[Oldiesfreak1854]

PPP had ridiculous polls in the spring and early summer showing Obama leading by at or near double digits in Colorado and Virginia.  They produced a huge number of other outliers.  They may have been the most accurate pollster by the end of the campaign but they were far from it early on.

[Benj]

PPP had ridiculous polls in the spring and early summer showing Obama leading by at or near double digits in Colorado and Virginia.  They produced a huge number of other outliers.  They may have been the most accurate pollster by the end of the campaign but they were far from it early on.

Given the final results, Obama leading by ten in Colorado right after the end of the highly damaging Republican primaries is hardly a surprise. Remember Romney's favorability ratings were in the toilet back in May/June.