From a Log Cabin Republican e-mail:

Exit polls show Sen. John McCain received at least 1.3 million votes from gay and lesbian Americansmore than any other Republican Presidential candidate has ever received.  He garnered 27% of the LGBT vote, an increase from 19% support for President Bush four years ago.

'Tis true. Not sure why. McCain did not engage in the kind of anti-gay bile that Bush and Rove trafficked in, and did not grandstand on Prop 8. He had an openly gay chief-of-staff for a long time, which might have helped. And then there were the Hillary hold-overs. That's my best explanation the uptick in LGBT GOP support this year. Maybe you have others.