This is my impression too, but I wonder how much is selection bias. I think a lot of times ADHD is spotted because a kid is bright, but underachieving. There's

This is my impression too, but I wonder how much is selection bias. I think a lot of times ADHD is spotted because a kid is bright, but underachieving. There's a glaring disconnect between potential and performance... could be many reasons, many of which aren't ADHD, but it grabs teachers' and parents' attention. But, what about a kid whose intelligence is not above average? If they are underperforming, would it be so obvious? I wonder if a lot of folks with ADHD in this category are more likely to go undiagnosed.