I have to agree with Paul in his blog post. I find that when a convention holds a panel such as "Women in Comics", it actually helps to emphasize the point that there are female artists in the big leagues. Even if it turns into "Gender in Comics", the topic is interesting and still relevant. For the most part, gender doesn't even play that big of a role in how a person creates their content. At a panel with a good discussion going, that point can be more emphasized.
When it comes to the big brands, I can still see that the creators are still majority male. It's not that they don't do good work, but the perspectives in style and story are always coming from one side. Why not try to add more variety?