I think you've misinterpreted my post.
I'm specifically avoiding revealing my background here for several reasons, but my basis begins with DSM-V and ICD-10 criteria as well as a large body of research on the underlying biology of the disorder.
If you want external confirmation, please search for the term "Hyperfocus" in PubMed, or through psychiatry textbooks, or any other well-vetted source of information. It's not there. However, you will find the term heavily used on internet forums as well as in seminars and books from a handful of doctors/authors who see ADHD everywhere, but the problem is that they're usually trying to sell you something (seminars, books, products, etc.).
You seem to have taken offense at my comment, but I please realize that I was defending the concept of ADHD as an actual diagnosis. The parent comment was the one insisting that ADHD was not a real diagnosis. I personally have relatively severe ADHD as a result of a traumatic brain injury, so I'm perhaps uniquely qualified having personally experienced both sides of the diagnosis.
Please note that those of us who were born with this have a very different life experience, and greatly outnumber those who acquired the condition through a head trauma, infection or other acute condition. Women manifest very differently than men. For example, girls are way underdiagnosed relative to boys at approximately 10:1 though it is improving I hear lately to 3:1. Why? because hyperactivity in girls manifests often as over talkativeness, and instead of screening the girl for the condition, her parents and teachers shame her for "talking too much." I was one of those girls. Boys who talk too much rarely get that criticism but because ADHD leads me to act outside of gender norms, the backlash is far greater for girls than it is for boys in many, many cases.
ADHD also manifests very, very differently in many people due to the various ways executive function develops in children. I have no difficulty getting places on time, but some ADHD folks couldn't get anywhere on time without significantly more effort.
When you say hyperfocus is only used by those who want to sell you something, I question your veracity. Hyperfocus is listed, if not a symptom in the DSM, then as one possible manifestation/result of the condition that is commonly seen. Others can include emotional outbursts, driving accidents, drug abuse, etc. For clarity's sake of those reading: hyperfocus is defined as the inability to direct one's attention to what is desired; being drawn into something in an irresistible way in a way that impacts functioning. Hyperfocus can also manifest as being incapable of switching away from that which is undesired.
This means that while the presence of hyperfocus doesn't definitively diagnose ADHD, it is a common presentation.
I see one of the world's top specialists in the matter, an MD who is the head of the department at a major teaching hospital in the Bay Area. He is a scientist first and foremost, which is why I picked him. He's very clear and direct with me about what we know and what is unknown. I want you to understand that the presence of uncontrollable hyperfocus is absolutely a manifestation of the disorder that is very commonly seen.
Without apology I do take what you say personally, because you are talking about a condition I have lived with my whole life, that has affected nearly every corner of my life in ways that were surprising to me and to everyone around me from my parents to my closest friends. You have only had the condition in your adult years and most likely do not have the same form I have. So yes, I do resent any suggestion that there is one way to have this disorder.
Net: I'm explaining to you regardless of your intent, you are spreading misinformation that can be used against people with the condition to further perceptions that this is "made up" and thus the conditions to which we are legally entitled should be withheld.
So please, stop. You are qualified to speak of your own experience and should, but when you generalize to the rest of us, you are doing real harm.