Ethnic diversity is less interesting (and less relevant) - I'd also call it a stretch to consider San Jose as the main city of silicon valley. The people actually working in tech are fairly homogenous culturally (which is what the OP was talking about).
I'm not saying this is bad, but that diversity may not be that important for a silicon valley like atmosphere and that the people who work in tech aren't very diverse. Palo Alto also isn't a very varied place and is the center of the current silicon valley.
I think a meritocracy and a willingness to try/accept new ideas rather than hold on to tradition is the important thing. I think that tends to go along with education, the more highly selected the better.
I'm not saying this is bad, but that diversity may not be that important for a silicon valley like atmosphere and that the people who work in tech aren't very diverse. Palo Alto also isn't a very varied place and is the center of the current silicon valley.
I think a meritocracy and a willingness to try/accept new ideas rather than hold on to tradition is the important thing. I think that tends to go along with education, the more highly selected the better.