Your point being? The final poll was within the MoE for the actual result and the +16 poll was before McCain shot himself in the foot by ineffectually suspending his campaign for the financial crisis, while the other three were after.
If McCain hadn't botched his crisis response the election would have been closer, with Virginia being a tossup and Obama getting under 300 EV, tho still the White House.
To be fair, I think that's why McCain tried to do something dramatic. If he had stuck to campaigning, he would have lost, just not as badly. If his stunt had actually worked, he would have won.