I also voted "other". I'm a school psychologist (*shudder*
) and so I'm often asked to give this diagnosis. I personally believe that there are some true cases out there, and that the true cases are chemically induced (for whatever reason) in the brain, but that those cases are few and far between. I rarely give this diagnosis at all, and feel like I've probably seen fewer than five kids with true ADHD in the ten years I've been practicing, and I never suggest to a parent that s/he medicate his/her child. Whether I not I think it's the viable option, I'm not versed in the side effects. But I will say that when a child is truly ADHD, it seems to work pretty darn well. The titration is very scary to me though. It's such guess work and so fraught.
Interestingly Lauren, I totally agree with you about the bipolar/ADHD link and it's a really hot topic in the medical and educational settings currently. They're also linked to autistic spectrum. But I'm sure you know that.
I fully expect to receive the medication phone call from my ds's kindergarten teacher a few weeks into the school year when he starts school (he's 3 now). I have no intention of telling them what my occupation is, and I know he's not ADHD, but boy-oh-boy, he certainly is spirited and assertive and spunky, and those traits often don't go over very well in the school setting. More of those things we cherish in adulthood that we also don't find very convenient in childhood.