I personally believe that "normal", when it comes to people's behavior, social interactions, and the way their mind works, is a completely broken idea. All of these attributes are completely fluid, depending on the when, where and who with you happen to be.
On that premise, the whole idea of neuro-divergence and the idea that you can classify people in arbitrary categories such as ADHD, Autism, etc ... and that this classification will lead to a way to "fix them" is complete and utter BS.
An interesting fact is that caffeine will often affect the "ADHD mind" differently. It's been reported to have no effect, or have very limited effect, or make people even sleepy, but almost always something non-standard. Once, in high school, without the supervision of my parents, I drank maybe 2 red bulls and 2 cups of coffee, 1 black. I remember feeling disappointed it didn't work, and I didn't feel any rush of energy.