Can you give a url for "Beyond the Square"? My daughter might be interested at some point.
Here are my (maybe gross-
I apologize ahead of time to any one offended! 
) generalizations after raising an Aspie daughter, now 16, and having read some of the "female Aspie" literature:
Girls are harder to diagnose and frequently just get dxed as ADD (mine did)! I have also heard it takes 3 shrink visits til the correct dx is made most of the time!
Girls because of their hormonal, social upbringing and female brain are better at empathy than male Aspies.
For the above reasons maybe female Aspies don't usually lash out in middle school the way boys do. On OASIS and other Aspie sites young male aggression is a big problem in the schools (as a result of bullying or meltdowns or whatever).
According to Tony Attwood many female Aspies dread growing up, looking mature and stall the process as long as possible (my daughter in a nutshell). Many will have little girl voices also for the above reason (also Tony Attwood).
Female Aspies look younger than the general population imo. They are frequently pretty and have angelic faces (this from another Aspie female online, she calls them "Aspie angel faces") Wonder what the metaphysical reason is. First the metaphysical, then the physical I always say....
For many getting married and having children helped them to mature (anecdotal, based on online chats with other Aspie mothers, particularly on OASIS).
Aspie girls are frequently preyed upon by unscrupulous males. We seldom let Hope out of our sight for that reason! We tell her never to be alone with a male she doesn't know or trust.
People can now add their favorite gross generalizations. But there is always a grain of truth in generalizations, don't you think guys?
Ellen, I wanted to respond to your post. I have a daughter, she is not diagnosed, my son is. My daughter is very shy, she has a degree in classics/history, she works as a cleaner.
She is able to achieve very well academically, both in sciences and languages. But she is very limited because of her shyness and communication difficulties. She suffers high anxiety when faced with social situations, new jobs etc. Like your daughter she has the face of angel, she speaks in a soft childlike voice, and people always take her to be much younger than her years. She is my precious baby, still.
She loves animals and she would make a wonderful vet, but her communication and social problems prevent her from taking up this career option. Instead she has decided to focus on a career in IT. Disappointing in some ways.
My son required a diagnosis as when testosterone kicked in - he broke down, he was diagnosed with depression, anxiety, social phobia and then when I finally made contact with a doctor who could recognise aspergers, the correct and helpful diagnosis made.