I personally believe that the amount of time spent in the game doesn't really matter. I've been playing Heroes 3 for 8 years, since I was 7...
Someone can play for a week and become a super-smart player, while someone can play for ten years and still be a newbie. Everyone votes based on personal preference.
And the survey results show what percentage of users like certain creatures.
And you can choose for yourself who is likable, who is strong, and who is useful.