Porter gives several (non-silicon) examples, including the wine-growing industry in northern California and the flower-growing business in the Netherlands.
Non-GAAP measures have been the bane of Silicon Valley and Internet firms over the years, and have been the cause of confusion and angst on many occasions.
Silicon Valley is the mecca for these young people who pride themselves on their non-traditional and unconventional approach to pursuing their passions and finding success both personally and professionally.