Asians, according to this article[1], represent 29% of Twitter's workforce overall and 34% of its technical workforce, despite being only 4% of the US population, while whites are significantly under-represented at 59% and 58% of their overall and technical workforce. Twitter's candidate pool is plenty diverse already.

[1] http://www.motherjones.com/mojo/2014/07/twitter-diversity-st...