Two quotes of note from the article:
...[T]he pollsters are finding that some voters whom they considered "unlikely" voters have in fact turned out to vote. Zogby gives Obama a 21-point lead nationwide among people who have already voted, and SurveyUSA and Civitas peg his advantage among early voters in North Carolina at around 20 and 30 points, respectively.
And:
And according to Tom Jensen, Obama has a 68-24 lead among voters who did not cast a ballot in 2004.
Holy Shiznickels.