I've been to a few gatherings in the Austin area. Met up with a DL that posted on Craigslist once (just an informal meeting over lunch, mind out of gutter!) Years ago I met up with someone after exchanging some emails.
What I feel should be pointed out is that while there is no hard, fast numbers on who many AB/DLs there are, chances are there are a LOT more than most people even within the community realize. Chances are most of us have meet someone else interested and neither party had any idea.
Not really the point of the thread, but my guess is that at least 1 in 25,000 people fall into some category of the AB/DL group. That number could actually be MUCH higher. In the Austin area we used to have a monthly dinner munch. A rough guess of the population of Austin and the surrounding area is about 2,500,000. The groups was always 10 or more. Then consider that it wasn't always the same people, and there were always at least as many more that wanted to come but couldn't for whatever reason. Add to that those that didn't know about the munch, or were too afraid to be seen out in such a group. Very easy to say the area has 100 or more AB/DLs. Not a stretch to say there could be as many as 1000! If that was the case, 1000 out of 2,500,000 or 1 in 2,500!
Some prospective. If you think you're the only one in your small state, community, city and I'm even close at 1 in 25,000... You're likely not alone. I've even heard stories of small groups (3 or 4 friends) in towns under 10,000. Think about big sporting events with 100,000+ attending and all the people working the event. That means there's a good chance 4-5 are among us. Heck, next NFL or college football game you watch or attend there's a decent chance someone there is wearing a diaper!