I think we overlabel ourselves and other people. ADHD and OCD get thrown around a lot, where people think because they struggle slightly with something or have 1 (Out of about 8) characteristics of the disorder, they must have it. OCD is not just liking things to be neat and orderly, it is having obsessions about circumstances and events that manifest as compulsions to act. There is little you can do to stop from obsessing or following through with the compulsions (Short of medicine). I have many things I am particular about. I wash my hands constantly and have my routine that I follow everyday (I eat the same things for breakfast and lunch, etc for the past 10 years), but I don't think I am truly OCD. Neither of these are disruptive to my life, relationships, or health. If I have to dig through the garbage to save my class ring or get filthy in order to help with some cause, I can do it (Though it does make me extremely uncomfortable to the point of having to talk myself through it). If something comes up and I have to change my routine I can do it (Though I feel like I forgot something for the rest of the day and tend to be more irritable). However I don't consider myself OCD because I can 'turn it off' when I need to. It may bother me, but it doesn't debilitate me. I think as human beings we crave structure and routine, just because it is comfortable and familiar. That does not mean every person has a 'mild case' of OCD. We had to label something as OCD because it was out of the norm, it was so bad that it disrupted lives, relationships, and/or health.
Myth Debunked that OCD Is Associated With Superior Intelligence. Researchers conducted a meta-analysis of all the available literature on IQ in OCD samples versus non-psychiatric controls (98 studies), and found that contrary to the prevailing myth, OCD is not associated with superior IQ, but with normative IQ that is slightly lower compared to control samples. The authors suggested that the small reduction in IQ scores in OCD sufferers may be largely attributed to OCD-related slowness and not to intellectual ability. Source 5t.