Yes, people are influenced by the top choice.
No, the results are acurate.
Well, not always the top choice, but the poll results are biased for a number of reasons: 1) DDO itself has a biased demographic - If I were to make a poll about Chinese influence in Africa, I'd be the only one saying 'Yes'; 2) Sometimes, poll topics and images attract a certain type of DDO user (liberals, conservatives, etc.); 3) Sometimes the choices are too limited (though not necessarily a biased poll like genesis') without an Others option or the ability to add answers.
It depends on the poll. If people strongly believe in something, they won't care what other people voted.
its meant to show which comments have the most votes, thats all.