Just when I acquired
some faith in humanity, you give me this...
Nonetheless, I looked at the sources and these projections are mainly based on fertility and mortality levels. I think that information exchange and scientific knowledge is becoming much more common, especially on the internet. There is almost an anti-religious culture on the internet, as a result of this information exchange, so I don't see the future generations being as 'indoctrinated' from just a single source (parents), as they were in previous generations. I think the flow of information will greatly increase awareness in the next generation, to an extent that parental indoctrination will comprise close to nothing in one's understanding of the universe.
I am already seeing this in our very own generation - as noted above (on the internet).