Are you sure? I suspect that they’re the people most likely to participate in those polls.
I personally can’t be bothered with these kinds of questions, but I remember that back in my early days, I was something of a zealot when it came to things I knew vs things I didn’t. I cut my teeth on PHP, MySQL and Flash/Actionscript. Had you asked me back then how I rated those things, I’d have given them 10/10, despite having nothing to compare them to.