There was a story on a blog entitled "10 management lessons from a young entrepreneur".
I find it interesting that a 22 year old entrepreneur believes mentorship to be a very important aspect of his business. At that age very few young people want advice from older people, but perhaps that is why he is successful.
The other side of the coin is that very few older entrepreneurs use mentorship either. Too many have too much pride. I love to bounce ideas off other people and get their input. I am sure there is a link here between people who are change resistant and who do not like mentorship.
The truth is that most of the entrepreneurs I meet are terrified of people "stealing their ideas", and consequently live inside a coccoon which leaves them isolated from some valuable input.