All this...and the poll shows the race as only even? What, did they exclude Republicans from the poll?
In all seriousness, if you go read the actual write-up of the poll, it reveals that this is registered voters. It says in the fine print that McCain has a two point lead among likely voters — yet further reinforcing my suspicion that the polling sample is over-infested with Rat voters.
There are more registered Dems than Reps nation wide. That is why the polling numbers differ.