I for one don't believe that there is one. The playing field is pretty level as to attitude and demeanor no matter what age and we all learn from each other. We all came here for the same reasons and that is why ST comes off as a loose yet constructively bonded family type of hell. The old hold the sage advise..."you turned that way too far" and the young have the "hey, what if" that the old had back in the day (still do) and it goes on, and on... If you young ones ever doubt the elders, I have "One Word" for you!