Reply #2: It's a well-known effect, people tell pollsters

[Lurker321]

they voted for the winner. Here is a study about it:

http://www.mori.com/mrr/2001/c010403.shtml

"in the USA, for example, where John F Kennedy won the Presidency by a tiny margin, the margin on recalled vote steadily increased during his term, and, after he was killed, some two-thirds recalled that they had voted for him."


or

http://www.annenbergpublicpolicycenter.org/naes/2004_03_hispanic-data-12_21_pr.pdf

"Nor are post-election recollections as reliable as what people tell exit pollsters on Election Day; there is usually a tendency for more respondents to say they voted for the winner than actually did so."