It's not just about your mentors but ask yourself how much am I learning from the people around me? The people you surround yourself that inspire you to do the best that you can do and those who you can learn from will make such a difference.
Learn from your core group of friends and those who you surround yourself with.
This is why cultures are built in San Francisco of like minded entrepreneurs and start ups, those interested in finance and wall street in Lower Manhattan, and those who you surround yourself if they don't help you to better yourself then you should consider change.