Interesting Poll on FaceBook

There is a poll on Facebook entitled Would You Vote for/against President Obama Again? Poll. So far over over 41,239 people have voted. Given that Obama won the election etc, you would expect those who supported him to be in the majority. But they aren't. Don't know if it is that they are unaware of the poll, or just too ashamed to admit they voted for him. As of this post the results are:

If the 2008 Presidential Election were held today, would you vote the same way?

I voted for Obama and I stand by that vote. - 29,418 (34.9%)

I voted for Obama and regret it. I would change my vote today. - 846 (1.0%)

I did not vote for Obama and I stand by that vote. - 50,889 (60.4%)

I did not vote for Obama, but now I like him and would vote for him today. - 534 (0.6%)

I didn't vote. But given the chance I would support Obama today. - 983 (1.2%)

I didn't vote and I really should have. I would vote agaisnt Obama today. - 1,628 (1.9%)