After a stormy 104th Congress, and the re-election of Bill Clinton in 1996, several members of the GOP leadershipteam were dismayed at Gingrich's confrontational style and the GOP's declining popularity.
Her collaborative and consensus-oriented leadershipstyle means that, when the going got tough, she pulled the team together in ways that respected everyone.
With that I believe the role of leaders is changing to a less hierarchical style in a way that their job is mostly about orchestrating a management team rather than retaining leadership to him as an individual.