That last poll they make has to be as close as they really think is right because they want to be called on next election as a gold standard in predicting the last election. They do not want to be Zogby, they have a business to run....
I am guessing this is the last NPR/DC poll. They are not a regular pollsters. So I believe this is it.
And to show a Romney win, says it all. Carville is behind this one (Democracy Corps), so he can say he predicted a Romney win, even if Romney wins by 2-4 more points. He had Obama’s number right, and the undecideds broke late, blah blah blah.
This is a meaningful poll.