The other thing is that people tend to vote for those who they think might be in trouble.
Normally at this stage of the competition it's just people voting for people they like, because most people voting on skating alone wait until later in the competition. In fact, most people don't vote at all, and if they do they wait for the final.
At least with tonight's three way vote the public voted for the better skater, once they knew she was in danger.