The factors in the index include economic output, population, Fortune 2000 HQs, foreign direct investment, commercial real estate construction/absorption/prices, higher education infrastructure, technology/venture capital, and innovation capability.
You never in a million years would have found San Jose on a list like this a couple of decades ago--we've really come a long way. Looking forward to seeing where all this momentum will take us.
You can access the full article over here. Hat tip to Todd Horvitz for sending this in.