Maybe it's because male creatu are easier to hatch? It's supposed to be equal (the percantage of hatching genders) but a lot of people have a male streak. O-o If there are more male creatu, there are more males to transform into a wyrae/rstu. Whatsoever.
Also, some people don't "prefer" males, they just have them. Take my profile pet Equine, for instance. He's a male. I'm not bothering to make him female, but not because I don't like females. I only use gender pendants when I think it is absolutely necasarry. I don't care of Equine is a male OR female. It doesn't matter to me either way.
It's nothing to argue over anyways. :P So there are more males, who cares?