i agree--i was officially diagnosed at 25--and that was after many tests and a PET scan that clearly showed it--that said I agree with layingback--I love ADD--most of the time.
the problem is that the clinical signs are too broad--but PET scans are too expensive--the best way to tell--give them Ritalin, Adderall, Dexedrine--and see if they calm down or stay-up for 3 days.
Just a personal note on treating these "disorders" with drugs.
In grade school I was considered hopeless and unable to concentrate because of my ADD and was put in the remedial class. Today, I do writing for corporate CEO's, tycoons, doctors , lawyers and politicians.
I was told I had no musical talent and lacked the focus to learn. Today I play nine instruments and have been featured in Bass Player and Modern Drummer magazine.
I was told I was wild and irresponsible and my child would be reckless and undisaplined. He graduated suma cum laude.
I was kicked out of the school play because I was told I couldn't take direction. I went on to appear in film, stage and TV.
I was told I was too scrawny to ever have any muscle. At age 40 I worked as a body model without ever using a steroids and at age 42 I placed in the NPC Championships after a few short cycles of under 500 mgs a week.
I failed my personal training test. TWICE. Today, I've had over 300 published articles in all the major muscle magazines.
I was told my theories were ridiculous. Today, those same theories are proposed and quoted by the reigning authorities.
I'm not saying this to brag, I'm saying it to show you can turn your life around in many ways. Don't listen to the naysayers. Most of the people that slammed me are fucked up, fat, alcoholics, or have kids who are headed for the slammer.
Who are the people prescribing these drugs? Who are the experts? I dated a psychologist and she was the messed up, dysfunctional person I ever knew. I had one shrink tell me I desperately needed to take anti depressants. Instead, I recorded an album and wrote a book which has sold over 10,000 copies.
Fuck them all. Turn your flaws into strengths.
Drugs have their place. But they should be at the end of the line, not the beginning.