Nerval's Lobster writes: In Silicon Valley they think differently, and if that leads to arrogance, so be it. At least that's what Bloomberg Businessweek's Joel Stein implies in his long meditation on the area's outlook on technology, money and changing the world. Stein set out to examine the underlying notion that Silicon Valley's and San Francisco's tech entrepreneurs are feeding a backlash by being, in a word, jerks. His conclusion seems to be that they may well be jerks, but they're misunderstood jerks. He doesn't deny that there's sexism and boorishness at play in the young tech community, but he sees the industry trying to make itself better. He sees a lot of egotism at work, too, but he says if you're setting out to change the world, you're probably going to need a big ego to do it. But tell that to other people in Northern California: undoubtedly, you've read about the tempest in San Francisco recently, where urban activists are decrying the influx of highly paid tech professionals, who they argue are displacing residents suddenly unable to keep up with skyrocketing rents.