http://www.washingtonpost.com/wp-dyn/content/graphic/2010/12/06/GR2010120607984.html
http://news.sciencemag.org/scienceinsider/2010/12/shanghai-students-world-champs.html?ref=hp
This is in the news yesterday, Shanghai 15yrs old students highest score in tests. In my opinion, this is not an indication of the general population, but just a handful of bright students.