No I didn't tell anybody except for 2 friends who had suggested it in the first place. Oh and I told my sister-in-law, because she has experience with Asperger's. But it was a few years before I told anybody else. Then I bought a button that said, "I'm not ignoring you, I have autism." I wore it once on my cap to the grocery store and nobody got impatient with me - getting groceries is easier now. I don't wear the button every time. And then once I wore it to walk the dog, which got a lot of people off my back - walking the dog in the summertime is hideous, but not so bad if people know I'm not *trying* to do things all the backwards way around. I have to be careful not to give the impression that I think I'm "special" or anything. Most people willingly give me the extra minute for me to catch up with things.
But I'm retired now. I would *never* have told the office!
And for teens - my guess would be that there's too much peer pressure, being different is not a good idea at that age.