I have frequent this message board for some months now and from what I have observed, dopers are more or less in their 30’s or 40’s. From this thread only one, if I’m not mistaken, was on his/her teen. But that was three years ago so he/she’s probably 21 by now. So, any teenage doper out there?
Well I’m 19. 
A whole two of us I guess.
I recently turned twenty. But up until then, I was a teenage doper! And, of course, there’s always Qin Shi Huangdi. There’s more, but I can’t think of who they are right now. They’ll pop up, I suppose.
There may be more than a few who enjoy not being known as teenagers.
I joined when I was a teenager. That was … a while ago.
I’m a teenager in every sense but the chronological one, in which I’m 24.
I was a teenager when I joined as well. In my head, I’m still a teenager but chronologically, I’m a few years past it.
I started lurking on this board when I was 14. Now I’m 20. That was a short 6 years.
I didn’t think I was that old, but this board didn’t even exist when I was a teenager, not even on AOL. I was 20 in 1999. Now I feel old.
Naw, there are Dopers in all age ranges. I’m in my 50s, but we have plenty in their 60s and 70s. We even have quite a few Dopers who are over 80. I don’t think members in their 30s and 40s predominate.
Same here. 
We’ve never had a ton of teens, or even early-twentysomethings, but I’m pretty sure there are a few college students and a couple of high school students currently active.
Well I’m 14, so probably the youngest here.
As I remember from when I was 19, “30s and 40s” is shorthand for “full adults”. The group includes people up until their 80s.
The OP may be making more subtle distinctions than I was at that age, but that’s certainly how I would have meant it.
Joined when I was 16, lurked since I was 15. Alas, time cannot be stopped and I am in my mid-20s now. Thankfully, my more embarrassing teenage posts seem to have been forgotten.
Also joined as a teenager. But that was more than 10 years ago, and now I’m almost 30.
I would like to see some numbers on this because I was 27 when I joined and now I am ummm…much older (38). The age distribution of this board has seemed to have shifted upwards with me and others. There used to be a number of teenage dopers when I started but now they are in their mid to late twenties with few new ones to replace them. I know there are a few dopers in their teens and early twenties but 20-something and 30-something Dopers used to be the norm and now it is 30-something and older. Did anyone else notice this or am I just imagining it?
Get off my lawn! 
The numbers are here (March 2010) and here (June 2011, but still open I think). The 30s-40s set is about half the population, or a little more. More 60s than teens.
One of my favorite things about this board is watching people change over time. I especially love seeing plans come to fruition, when “Tell me about Law School” threads lead to someone being a lawyer years later and such.
Yes. That is quite what I meant. I observed that majority here are adults and I wanted to know if there are also active members who are in the same age bracket as mine. (so I won’t feel alone)