The congregation that I attend is a little different. I don't think its the norm but:
around 130 publishers
9 elders (1 - 80s, 1 - 70s, 1-60s- 3-50s, 1-40s, 2-30s) while there are some lazy ones (2) for the most part they divide things up fairly evenly. They don't get along with a definite break along generational (a real generation not a WT one because they're all the same generation according to the WT) lines.
7 ms (1 -80s, 1-60s, 2-30s,3-20s) - Of this group, one in his 30s will likely be made an elder, if not this go around certainly next. He was a late bloomer for a born-in and wasn't appointed a ms until his late 20s. The other one in his 30s is a slacker. He was my CBS assistant way back in the day and I know he fakes FS and all his parts are worked up at the hall. He likely won't make the cut but is politically connected which is why he's never bothered about his lack of effort. The 2 older ones have maxed out. The 3 in their 20s are all elder material. They put plenty of time on their FS slips (or they give that impression) and are actually much better speakers than the majority of the current elders. If they all stay on their current course, I can see them appointed in their late 20s/early 30s.
18 pioneers as well
But, I would tell you that this congreation is likely one of, if not the most zealous in the circuit. Not to say they don't do what they want. I was just at a gathering (I hate that word, its a #%$# party) this weekend and believe me, folks let their hair down. Yet, people were at the meeting the next day (hungover but made it).
I think if I were to look at the majority of the congos I'm familiar with in this circuit, most of them are how everyone else is describing. I'm pretty sure this one is an outlier
