It might be a stereotype, but I always think of women being more thorough in their explanations and descriptions...and more talkative to some extent. Men tend to be more blunt and curt (sp?) and somewhat more smart-alecky than women. Obviously everyone doesn't fall into the stereotypes. But I find myself being influenced by those biases when I'm assuming someone's gender. As far as ages go...I'm always way off on those. I always think people are younger than they really are. Not sure why that is.