The increase in the youth vote accounts for 26 EVs and was the margin of victory in NC and IN in my numbers. More below...
The youth vote accounted for 18% of the electorate, up one percent from their typical (and 2004) level. However, Obama got a higher share than Kerry did in 2004. Notice something especially cool about this data:
The youth vote, as a proportion of the electorate, was HIGHER than the >65 crowd. The old axiom that only old people vote, is breaking down. I wish I knew the historical number for the >65 crowd.
BTW, that one percent increase, at a 66/32 split for Obama, is work 28K votes in NC, less tham Obama's margin of victory. That is probably also true in Indiana (and may be true in MO - if he pulls it out). So one can say the increase youth vote was work at least 26 EVs.