It does say Asian, not Asian-American. Asian means from Asia. You wouldn't call a white American a European.
Are you kidding, right? There is no such Asian vs. Asian-American in this type of statistics. The Asian is determine by their appearance (and/or genes), not where they were born. People see Asians born in America as Asians when they first see them. Even when they speak to them, sometimes they can't figure out without asking them whether the Asians were born in America or came into the country when they were very young (no accent). That's why statistics usually uses the word "ethnic". I have a feeling that you are an Asian and were born in the U.S. because your reply seems to show that you are offended by being seen as Asian only.
Anyway, I still don't really see the issue in this hiring. Besides, there is no need to make a big deal out of it anyway. Why do they need to have high population of Asians in a company locating in Silicon valley? If there are 2 equally qualify candidates. One is white American and one is Asian. Companies should have the right to pick whoever they want whatever method they please. There are many other jobs (or things to do) outside Silicon valley anyway.