At some companies, the median age of workers is under 30. But the older, more established tech companies have older more established workforces, like Cisco, Dell, IBM, Oracle and Hewlett Packard. (HP data is from before the company split). The median ages of their workers is over 35.
In any case, the youth-loving culture of Silicon Valley is no myth, as the chart below shows.
And, as we previously reported, it's having an effect. Older workers are getting left out - or at least feel like they are.
"There are tons and tons of lawsuits filed for age discrimination," labor lawyer Kelly Dermody at firm Lieff Cabraser Heimann & Bernstein in San Francisco told us.
In the past couple of years, more Californians - home of Silicon Valley - are suing for alleged age discrimination than for alleged racism, she says.