I've worked with some students from Kindergarten through 5th grade and am still amazed at far they came, socially.
On the other hand, I have a niece whose mom and grandmother denied she had any problems. She never got any help even though the school tried. I always suspected she has Asperger's but I was ignored. Now, this young lady is 20 years old and never had a job. She can't interview as she's so uncomfortable talking and communicating with others. It's very sad when I know what can be done.
At first there was “denial” around here ... and when I said to look at this objectively and rationally - I was met with anger, many times. However, I persisted and finally the facts were incontrovertible (apart from me) - so now “acceptance” has resulted in good treatment.