It's a myth that it's a myth.

"Correspondence (letter to the editor): Paradoxical Reaction in ADHD":

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3163785/

Speaking as someone who's wrestled with ADHD all my life, as has my spouse, this is definitely not false. And your claimed test makes no sense; if you haven't exhibited symptoms of ADHD, how can those symptoms be erased?

Perhaps I misunderstood your comment, you said that people with ADHD react differently and I was assuming you meant they do not respond in the same manor as someone else who just took a stimulant.

Often you hear this saying that people with ADHD feel relaxed when they take a stimulant and don't feel any increased energy or mood lift, which of course is false. That's what I was referring to.

People who are already energetic may not notice increased energy at therapeutic doses, though I certainly noticed. I don't think anybody feels relaxed, but it does quiet the hyperactive impulses and behaviors, which can easily be mistaken for being relaxed.