Gender snobs?

As a mom of 4 young boys I have noticed something interesting, whenever I am part of a moms group/club there is some sort of eliteism among the moms. Those moms with little girls are at the top of the pack and they do not want your boys any where near their girls! They dress they little darlings up in bows and frills and talk about the joys of having a child who will one day be thier shopping buddy!

I have also noticed that once the kids get into highschool age it is the moms of boys who are at the top..the boys are noted for thier athletic ability and the boys are the ones who hold a lot of social power.
Have you seen or experienced this? How do you react to the other parents? What about those who have both gender children do you notice any of this?