Real. ADHD-PI, -PH, and -C are approximations. Each person has a smattering of symptoms of the DSM-5 criteria. [0]
I'm classified closer to -PI because I'm not like a hyper woman friend, but I still have abour half of the symptoms in each area but not enough to be called -C.
My parents believed it was a psychiatry conspiracy theory, which only caused me more problems for years of non management.