I find it interesting that many people on this thread automatically jump to the idea that the OP's SD might have Autism. No wonder Autism is such a growing diagnosis. I've studied this in a post-Master's program (diagnosis of various mental illnesses) and Autism is a highly diagnosed and mis-diagnosed illness because it has become the "accepted" disability. Why? Just read this thread and you'll see that people tend to focus on how "smart" or "brilliant" people with Autism are or can be.
On the contrary, most people with Autism have mental retardation aka developmental disabilities. Those with Asperberger's Syndrome have an average to above average IQ which is what separates them from those with regular Autism. From the OP's post I have not come to the conclusion that this child has a high IQ.
OP, don't try to pre-diagnose your SD. I realize you are asking for help, but then you get all kinds of different suggestions and most people will fall onto the Autism bandwagon. Thinking about the birth mother leads me to think there are other issues, but I'm not going to go into what I think because I don't know this girl at all.
Good luck, OP. As others have said, your SD is lucky to have you. Don't look backwards, just move forward. Oh, and my DD used to be (and sometimes still is) the biggest slob around. When she was in the 6th grade it was an ordeal every night to get her to take a shower. Then one day out of the blue, I heard the shower turn on without the "fight." Then I heard it again the next night, and the next night, etc... Now she wouldn't be caught dead without showering and spending an hour getting ready to go out. Your DD may not be there yet, but with proper guidance and a good dose of hormones (interest in boys), she will hopefully get there. Maybe not as soon as you hope, so hang in there![/QUOTE
Be careful here. Autism is not a growing dx because all of we parents are rushing in looking for it. I would say a large part of the growth is due to non-verbal IQ tests, which really enhanced testing for the non-verbal population. As you know, unfortunately, many people with autism have difficulty with communication. These individuals did very poorly on previous IQ tests, and probably were labeled mentally retarded 20 years ago.
Also, the numbers are growing for reasons that no one, not even experts can pinpoint. Now you are correct, in that many people with autism, I've read stats reporting as high as forty percent, are cognitively disabled. People without personal experience with autism often have a "savant" stereotype such as the movie Rainman. The children I've met with autism, including our own dd, do not have some compensatory genius, that makes up for her communication, sensory, and perseverative behavior deficits. This does not mean that others do not have a different experience.
I also agree that we cannot dx her daughter, which is why my post stated that, and suggested going to see a developmental ped.