I have never seen an exit poll favor republicans. I have seen many elections lost when urban centers provided just the amount of votes needed for dems to prevail well into the morning.
That’s what I was thinking. If exit polls show Romney ahead, they won’t get reported by the MSM. I think republicans work during the day and don’t vote until after 5 pm. Dems have all day to vote. That’s why exit polls show them out front early in the day.