No, not that kind of vote, but more like using this "clicker" during a lecture.
This article describe this teaching aid where students are given clickers and at certain points during the lecture gets to "vote" on the answer to certain question. Many of these have been tested in physics lectures. So the article explores if they are as effective in mathematics lectures.
The bottom line at the end of the article summarizes what I think is a more accurate reflection of this whole thing. And as has been mentioned before in other entries here on teaching, a lot of this depends very much on the instructor and how he/she is engaged in teaching the material.