Perhaps a change of wording would be helpful - when others believe you are inferior, or treat you as such, you have to struggle just to hold your place, just to hold your own. Kind of like swimming upstream, it can be exhausting just to make a little progress. There's a front-page article in today's Boston Globe that somewhat applies to this discussion. Video-gaming/computer software game design is, typically, very male-dominated. A female gamer/designer, in her blog, made a fanciful comment about a male group of gamers feeling threatened because the percentage of women involved in game design might move from 3% to 8%.
She has received death threats. She has been threatened with rape. Her home address has been posted on the web, with the comment "I know where you live!".
I can't imagine a situation where the reverse of this would happen - where a man would make an innocuous comment such as this, regarding employment/participation in a field, and be threatened in the same fashion, with such overt intimidation of serious physical harm or death.
That's not to say that there aren't women who resent a male participating in "their" field (some of Geno's experiences breaking into the ranks of women's coaches come to mind). But, I don't think there's nearly as much heavy-handed. blatant threat of sexual assault and physical harm.
It's kinda hard to believe, in this day and age, that such heavy-handed gender-based bias exists, but it does. It manifests itself in many ways, from the glass ceiling in business, academia, and politics (basically, leadership roles anywhere), to the casual comments made on the street, in the media, certainly in contemporary music. I don't know why, in this day and age, I see and hear some of the stuff I do - it seems to be less enlightened, less tolerant than I remember in my 20's. Although the society has progressed, overall, it doesn't appear to be nicely linear, but rather a "two-steps forward, one-step back" sort of deal. Anyway, I digress.
And, it's not just women who get stereotyped. I also cringe at the way adult males are so often portrayed in media, as nothing more than dumb, large, irresponsible children with excess testosterone.
And, I do believe that there are differences in the genders - physical certainly, social-conditioning certainly, and possibly in the way the brain functions/reacts/reasons to certain situations or stimuli. But, that doesn't mean that acknowledging "viva la difference" permits discriminatory or demeaning behavior that has little if any basis founded in those differences. For some folks, "different" becomes "lesser", and justifies all sorts of ignorance.
We've gone awfully far afield from the original theme of this thread, which was based on the athletic success of a 13-year old girl participating in Little League baseball. She's not a big kid - Wikepedia has her at 5'4" (can't confirm, did not see her standing next to MoJet), and 111 pounds. Although girls are sometimes still bigger than the boys at this age (certainly the physical disparity we see even through high school is lesser in middle school), she certainly doesn't qualify as being unusually large for her age. So, her success is likely based on skill, good coaching, hard work, and an unusually strong mental game. I'd prefer to celebrate that, rather than go through some of the dissection that we have.