In mid-September (Sept. 9-14), McCain held significant advantages among those earning more than $75,000 a year, white evangelical Protestants, whites who have not completed college, and white men. Today, he maintains a significant advantage only among white evangelical voters, and has lost the lead or seen it shrink in most other categories.
For example, among voters earning $75,000 a year or more, McCain held a 53% to 39% advantage in the Sept. 9-14 survey. Now, Obama leads by 52% to 41%. After the conventions, McCain held a 52% to 38% edge among white voters. Today, he and Obama are running evenly at 44% each. In September, McCain held a 56% to 34% advantage among white respondents with some college education. Now, the candidates tally 46% each.
(It's over - barring a black ops terrorist attack. The "fat lady" seems to be clearing her throat.)
Addendum: just found an article that reviews the history of October surprises.