I got diagnosed with AS at 11, then also diagnosed with ADHD a few years ago (although I wasn't looking for a diagnosis, the doctor just gave me one, bah). Personally, I'm not entirely sure if the second diagnosis is correct or not, because I was especially surprised he diagnosed me with it so quickly and out of the blue seemingly just based on what he saw over a 15 minute time span while I was talking about how school was going. I think a massive amount of misdiagnosis for ADHD goes on, and as a disorder itself it's a little vague. I seem to have some of the problems, like inability to maintain attention and focus on one thing without my mind drifting off or getting distracted, and ritalin certainly helped me enormously in my final two years of school (when from getting D's to A's in some cases, although I'm not on it anymore because I'm sick of the side effects), but I don't seem to display all the characteristics, like temper tantrums and all that.
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Into the dark...