It might make sense to find a more advanced program for him before you go do anything else. If he's as advanced as you say, boredom could be the major factor beyond anything else. If his behavior doesn't change after that, I'd consider the other options then.
Also, congratulations on having a kid who has problems in school because they're far ahead; as problems go, that's a pretty good one to have. :)
If I had a child with this problem, I wouldn't even consider drugs. I would do my best to challenge them with higher-level reading material, computer games, programming (Logo or something) as soon as they're ready, etc.
I would also try to get them to meditate with me. That is the best way to learn to manage a wayward mind.
Neurofeedback, if I understand correctly, is a kind of electronically-assisted meditation. As such I think it might be worth trying if they just weren't ready for more self-directed forms.
I'm not a believer in ADD medication, even though I've been diagnosed and prescribed ADD medication. It just becomes a new state, most of the problem lies in finding healthy ways to deal with the issues. Try meditation and yoga to start with.
To be clear, my son is not at pre-school for the academics. We feel that it is important for him to experience a social atmosphere, and although he is ready to learn at a kindergarten or 1st-grade level, I don't know that putting him in a class with children much older than himself would be beneficial.
I've never felt there is "something wrong" with him, but it would be good if he could operate within the norms of a classroom.
I would like to homeschool, but my wife does not feel up to it. (I'm not putting her down at all, it's a big task and requires buy-in from both of us)
For academics, I continue to teach him at home interactively, and he also loves self-directed study.
The real difficulty for him is listening to the teacher, and not running around when he should be sitting, not screaming when he doesn't get his way, etc. At home, if he has something interesting to work on he can sit and concentrate easily for an hour or longer.
Edit: My fossilized list of recommendations: http://www.kidslikemine.com/archive/supportontheweb.shtml
It isn't remotely current. I am very out of the loop. But Hoagies is linked there and she should have more current info.
Ritalin is nearly 60 years old.
Congratulations on your doctorate! Did you go for an MD or a PhD?
Why would you think you would be diagnosed with an executive function disorder?
Trust your instincts. Maybe this environment isn't right for him? How would you want him to behave in this kind of environment?
Nevertheless, we had him tested by a neurobehavioral specialist who believes he has ADD. The doctor recommended either drugs or neurofeedback. http://en.wikipedia.org/wiki/Neurofeedback
I'm very hesitant to give my 5-yo any medication, but we are considering neurofeedback. I'm curious if anyone here has any knowledge or experience with it.