That's not a bias, it's simple fact. Asians have SAT math scores 72 points higher than average, TIMSS scores 74 points higher than average, and are disproportionately represented in professions requiring significant mathematical background.
http://www.infoplease.com/ipa/A0883611.html
http://en.wikipedia.org/wiki/Trends_in_International_Mathema...
Further, the top 5 nations on the math component of TIMSS have been the 5 first world countries in Asia (Japan, Hong Kong, Singapore, South Korea and Taiwan) in all years since 1995 (in 1995, Taiwan was not included, and Belgium was #5).