It's entirely possible that your ds may have been misdiagnosed. Yes, I agree with you that if your child can sustain attention for long stretches of time with a book, a snap circuit, or something else that engages him and stretches his mind that it's possible your ds doesn't have ADHD.
My ds10 was misdiagnosed with ADHD at age 6. We took him to neurofeedback instead of medicating him after we saw an expert who recommended it. Neurofeedback confirmed that ds doesn't have ADHD based on his actual brain wave activity. Also, ds is 2e/pg and the OEs can make it look like ADHD. That's another factor many people without expertise on giftedness or 2e kids miss.
