It's the author's own fault. He/she starts off with "(think Facebook, Twitter, Google, etc.)", then proceeds directly to show the survey reflects a variety of i

It's the author's own fault. He/she starts off with "(think Facebook, Twitter, Google, etc.)", then proceeds directly to show the survey reflects a variety of industries. There are vastly different considerations for real world business versus Internet based ones, and that affects the profiles of founders for them. (e.g. PlaySpan.com founder was age 10!)