http://www.newyorkerstore.com/October-12-2009/I-wasnt-texting-I-was-building-this-ship-in-a-bottle/invt/133708

Silicon Valley is better for "brave, new world" revolutionary innovation, but not necessarily for "better, faster, cheaper" evolutionary innovation. Advances that require building on years of previous knowledge require more stability than the Silicon Valley environment can provide. Example: more successful microprocessor design is done in either Oregon, Haifa, Austin, New York (IBM), etc. than in Silicon Valley.