In my experience, the popular schools that Silicon Valley ends up recruiting from are Cal Poly and San Jose State. Waterloo is another favorite. At least this is the case from my current employer-the fruit company.
The world’s greatest search engine and the most popular social media website tend to hire grads of the most prestigious schools.
SCU is an oddity-my alma mater’s placement in the top companies in the valley of silicon is really rare. That’s my experience.
My conclusion is that school doesn’t necessarily matter. If you can do the work, you are more than qualified. Steve Jobs never graduated from his school and he was the cofounder of a company whose sales/profits rival the GNP of some countries.