This is a very, very stupid poll. If George Washington came back from the dead and tried to capture the presidency, I'd vote for Bush as well! Why? Because he knows who Osama bin Laden is. And he has likely heard of the internet, not to mention Medicare. And his context isn't centuries old.
The poll's only interesting feature was that Bush won among Republicans and Washington won among Democrats and Independents, proving that we've reached the level of polarization needed to make an Encino Man candidacy viable.