You apparently are not aware of how many companies in Silicon Valley have divisions in Reno and Las Vegas. Damn near all of them. Why? So their employees and they themselves do not have to pay California taxes if they so choose. It is a bloody selling point when trying to get employees. The corporations (e.g. Oracle, Sun, and other major players) all have Nevada tax shelters and are set up in such a way that their employees can take advantage of it as well. You'd be surprised how many major tech companies have "offices" in Reno or Lake Tahoe. It is SOP in the Silicon Valley; maybe it is different where you live. And the State of Nevada encourages it.
"Living in Nevada" is a pretty easy trick to accomplish, despite the fact that California has tried to clamp down on it. I know lots of people that "live in Nevada", either figuratively, technically, or literally that nominally work in Silicon Valley. Not being a California resident is encouraged in Silicon Valley from the top down in a great many companies, and the entire private infrastructure actively supports this dodge. I own lots of property in Nevada, and have lived there at various times, and so I have a pretty good idea of what's involved. Any moron can move their residency if the company they work at is tacitly supporting it.
Of course, that's Corporate. Perhaps those Silicon Valley types don't understand the diff between Corp's and individuals?
Don't bet on it.