As some of the other posters have said , the issue isn't just quantity - it is quality.
Just as 12 year old children can now get baptised , so COs (following direction from the WTBTS) are leaning on BOE to appoint brothers as ms or elders who would never have been appointed years ago.
I know a 19 year old kid who was recently appointed as a MS - he is essentially just a layabout who plays computer games all the time but because he goes out in the ministry mid-week he is perceived as a "spiritual man". Another was a 50 year old guy who has been brain damaged from a life of drink & drugs before becoming a JW. 10 years ago there is no way these would have been appointed - they wouldn't even have been considered. I know that some of the elders in these congregations were against these appointments but were outvoted.