"Microsoft, Apple, Yahoo, Google, Facebook, etc." - it's interesting to see Arrington so narrowly define successful entrepreneur stories. Dietrich Mateschitz,

"Microsoft, Apple, Yahoo, Google, Facebook, etc." - it's interesting to see Arrington so narrowly define successful entrepreneur stories. Dietrich Mateschitz, the founder of RedBull, was in his mid-40s when he started the company and it wasn’t until he was in his mid-50s that it really took off. In my experience the 40s seems to be a sweet spot – resources, contacts, and experience all come together at that point . . .