as an interesting related note, both Sergey Brin and Larry Page went to Montessori pre-school and have attributed that to be a factor in their outcome.

http://www.youtube.com/watch?v=0C_DQxpX-Kw&feature=youtu...

edit: looks like Jeff Bezos went to Montessori too. Obviously children of motivated parents are likely to go to private school, etc...