That sounds both crackpot and irrelevant. I suggest citing sources and elaborating how this has anything to do with the article.
But yeah, I don't see the number 10,000 or 20% and I don't see what that would have to do with increasing maths intake in Universities by devaluing degrees...
A more nuanced view of the relationship between brain size and brain capability can be found in a Scientific American article that quotes some of the leading researchers on the issue.
http://www.scientificamerican.com/article.cfm?id=does-brain-...
As another reply has already pointed out, the Flynn effect
http://cscs.umich.edu/~crshalizi/reviews/flynn-beyond/
is an empirical observation that IQ scores in large, pan-national data sets that have been gathered by standardized methodologies have been rising all over the world for most of the last century.
http://en.wikipedia.org/wiki/Neanderthal
However, this isn't particularly relevant as we aren't descended from them and AFAIK the link between cranial capacity and intelligence isn't clear.
Maybe you should share some of your own citations before making claims like that.
The correlation between raw volume performance on general mental ability assessments is about .4, which is very significant. For a comparison, siblings' intelligence has a correlation of about .47. Considering that siblings share both a great deal of the same genes and have a similar environment, the fact that brain volume has nearly the same correlation is huge.
http://informahealthcare.com/doi/abs/10.1080/002074508023258...