Ok, conservative 'tards, calm your butts.
I know that you're all pissed because trans people are becoming more accepted while its still frowned upon that you're all banging your sisters.
Now... "Champions of individual liberty"... You should be the first people respecting this kid's right to decide his/her own identity.
In short, it's none you g*ddmn business whether he/she wants to be a girl, a reptile psychologist, a martian, whatever. Crawl back under your rocks and pipe down.
ALL THAT BEING SAID:
She should not be allowed to compete amongst biologically female runners. Point. Blank. Period. End of story.
She should be supported for her decision, and granted the same respect you expect for yourselves. Transgender people are not mentally ill for wanting to be a different gender. It's culturally relative. I've lived in countries (Southeast Asia/Pacific) where transgender people are considered to be quite normal, and have been considered to be that way for centuries. Nobody seems to be too concerned about which bathroom they use or which direction they wipe their butt in. They simply mind their own business and go about their lives. Imagine that! They are regular human beings who work, eat, sleep, breathe, etc. They just happen to assume a different gender role.
However, this obsession with pleasing every individual kid for every type of preference they have is insidious. Communities are more important than individuals themselves.
How many girls are going to be denied fair competition because to accommodate this *ONE* kids needs. She is still a kid and as a kid can be selfish as teenagers typically are. She needs to be told no- that this is not fair and that she needs to take the needs of others into consideration. We cannot teach kids that institutions will rearrange themselves to make them feel good.
Enough is enough.