I was doing some research for a recent interview with Tina Brown when I came across this assessment:

“There are  —  if I may be permitted to oversimplify wildly for a moment  —  two kinds of women in the working world who achieve great power. The first is those who are good at what they do and enjoy working with other smart or talented or thoughtful women.

More information: http://www.chicagotribune.com/lifestyles/stevens/ct-life-stevens-friday-women-bosses-1201-story.html