Possibly the one irritating thing about being a true "outlier" is that some individuals mistake natural gifted/creative/intellectual behaviour for a plethora of conditions. Intensity and creative excitement becomes pathologised as "OCD", boredom due to having a significantly faster brain becomes pathologised as "ADD", natural introvert behaviour (which is strongly correlated with high IQ) becomes pathologised as "Asperger's", and so on.
I really didn't think there was anything wrong with me to begin with, but it was hard to convince my family and my significant other. My partner has read the book and I'm going to make every member of my family read it too. I was definitely misdiagnosed when young. Luckily, where I grew up and went to school in the 1970s, the over-zealous drugging of schoolchildren was not yet in vogue.
The author gives detailed lists of both gifted characteristics and various disorders side-by-side, so that readers can distinguish where it may be prudent to seek a second opinion. However, the author also makes clear that dual diagnoses may be in order, and gives clear and to-the-point advice where this may be the case.