The company is 51% white, barely over half. They are making progressat a rate of 2% per year, if the goal is to be "less white" . How fast can a company change with Facebook's attrition and growth rate?
49% asian includes a several ethnic phenotype. Grouping them together makes it look like a monolithic block when in fact it probably means large pools of Indian or Chinese ancestor employees. Would facebook look more diverse with a finer breakdown?
Certain groups, who are under represented in engineering colleges, are also underrepresented in their employee pool. Facebook could do "fake" diversity like a lot of companies where HR, facilities and non-tech jobs are disproportionately black and Hispanic. It would help them make their public numbers without actually creating oportunities :-(