Has the boys age lowered as well.As I can remember just having started comprehensive school(senior)in the U.K and that would have made me maybe 11 or coming up to 12 .Anyway, when we used to get changed for swimming I can remember that all of us was in awe of this one lad who practically looked like one of our fathers,he had obviously started shaving had a hairy chest,armpit hair,etc,etc, the works!!! I can still remember all of us feeling quite inadequate at the time,as none of us would get changed next to him lol
I was one of the girls this article mentions... I actually ended up developing a condition called PCOS (polycystic ovarian syndrome) by about the age of 9 or 10, but it didn't really make itself obvious until I hit 15 or 16. PCOS and early puberty usually go hand-in-hand. A woman with PCOS was likely a child who hit puberty sooner than normal.
Looking at my life as a young child, I actually want to say that a bigger part of why it happened to me was the exposure to chemicals like BPA, which would have been in the bottles my mother fed me with. Also, I drank a LOT of cow's milk as a child. Given that it's usually tainted with hormones, probably more so back in the early 80's than now, that could very easily be where a greater part of my issues stemmed from.