That's a good possibility. I have also heard that soy effects the reproductive organs. A possible cause of kids literally maturing too fast? Just a thought. I know I do not have anything with soy in it. It does weird things to me.
Yes, it has a huge amount of phytoestrogens. Feminizing boy babies, and driving girls to premature puberty. Frightening stuff.
The kids maturing much sooner than in times past has been blamed on hormone fed animals - namely the fastfood hamburger. Funny though, those burgers don't help me with my batting average.
Excessive soy intake can indeed cause hormonal issues, for both males and females.
People in Asian countries, which radical vegetarians hold up as examples of soy consumption, actually take in very little soy. If anything it's in the form of natural soybeans (edamame) or small amounts of tofu...not the heavily processed soy milk, and soy crumbles, and soy cheese. Phytoestrogens aren't necessarily a good thing to have too much of.
This is purely anecdotal but I know several vegetarian or vegan women who consume a lot of soy, who have had infertility or PCOS. When I was a vegetarian/vegan I had hormonal imbalances - when I stopped overloading on soy and started eating meat and eggs/dairy again, this naturally corrected itself. Although I still enjoy the occasional Boca Burger, that's it for soy consumption.