It will be a good follow-up area of research to see how much of that brain reorganization from early childhood to adulthood can be influenced by experience, that is by good education. Here's a link

http://www.amazon.com/Knowing-Teaching-Elementary-Mathematic...

to a very informative book about math education and how it can be better. I strongly suspect the brain reorganization happens better and faster for learners with good math teachers rather than lousy math teachers.