Now its become a popular option its turned into selection system like a Goldman sachs graduate recruitment program. Precisely because its those type of people running these things.
Fundamentally i'm not sure they have the same character as the previous entrepreneurs. Those guys specifically chose to take the risky untrodden path. That said something about their personality. That could be the piece that makes a successful entrepreneur.
Its not like that anymore, so the people choosing to do it are a different breed. They are more like people who go to work for investment banks now.