Pet theory... If you start from the overexcitabilities concept, your brain gets oversaturated with information so you need very selective control to not be overwhelmed. Once you have that control, you may have the ability to focus or not focus as you decide.

BUT, that isn't the "normal" state, focus would normally be much more automatic. Once focus is under executive function control, you may not be wired for ADHD but to all intents and purposes you act as if you are, but you can also pull away a ton of resources from other regular mental activities (e.g. reinforcing todo lists or people's names, awareness of space, reading other people's non-verbal communication, acquiring physical skills through observation, spacial awarenesss, encoding automaticity, etc.) to amp up your smarts even further.

Under this framework you can easily achieve five blind men describing an elephant in diagnoses. Visual processing disorder, check. Dysgraphia, check. ADD, check. Pragmatic language disorder, check. Maybe that's why I read of some pediatricians using drugs to diagnose, because the answer is quicker that way.

If it is a valid framework, then cogntive type behavior training on redeveloping automaticity and attention splitting may be a great generalized first step.