I am not 100% sure (how could I be?), but there are times when I feel myself being biased towards voting for answers because they have already received a lot of votes. If this were true, this would cement early answers with some early votes at the top, because people keep voting for the top-voted answers.
Hypothesizing that I might not be the only one to fall prey to this kind of bias, I propose an option to hide the number of votes on answer. Answers may still be ordered by the number of votes, but they don't have to be visible really (basically hiding whether two subsequent answer are almost tied, 51-50, or very different 100-1).