I don't know that many people (if any) could be truly un-biased to choose one or the other. I like Python but I learned Ruby first. Every encounter with Python gets compared to Ruby in my mind. "Ruby doesn't do things like this. Is this better or worse than what I'm used to?" I'm sure a Python developer looking a Ruby does the same.

Unless you ask just the people who looked at Ruby and Python at the same time, I think your poll will be weighed to whether readers were Python devs first or Ruby devs first.