I'm 52 and wasn't diagnosed until 2001. I was one of those guys who it was no surprise to anyone when I was finally diagnosed. I have noticed some of the symptoms have gotten a little worse since I hit about 50. From what I've read even "normal" people experience minor ADHD-like symptoms when they get in their 50's. Theirs are mild and sporadic, but similar.

If you ask anyone, "Have you ever read a page in a book and when you get to the bottom you realize you have no idea what you just read?" They all laugh and say "Yes, all the time." Well, they don't really mean "all the time." They have no clue what "all the time" is like.