Life as a Bootstrapped Entrepreneur by Richard Branson is spot on.
Are startups predominantly run by white males or are they just the one's on the speakers circuit?
Why does it matter?
It may not matter at all. Then again it could be an indication that a large group of people with excellent ideas are not joining or progressing in an industry.
Neither is true.
What region of the world? Does "startup" refer only to new, science/engineering based businesses?