I live in Silicon Valley, but I guess I don't know anyone who's really elite. I believe it though. A few years ago Zuckerberg did a life experiment where he only ate meat that he killed himself. I wouldn't be surprised if his example kicked off an interest in suburban backyard farming.
BTW: if you have a lawn, you're not above this sort of thing. Lawns are another culture-bound status declaration that's tied up in resources associated with ownership and maintenance. It's just that the origins of lawns are so far in the Western World's past that we don't think of that, and the costs associated have come down enough that they're a middle-class trapping instead of a noble one.