Distributive Leadership: Fact or Fiction?

Distributive leadership is a fine leadership style in theory:  a leader is able to distribute or share important leadership jobs and roles amongst his or her staff thus lightening the leader's load of responsibilities and forming a group or organization based on mutual ownership and trust.  Unfortunately, it takes many working parts for the whole to function.  First, a leader must be willing to give up some degree of authority and decision-making power.  Second, there must be competent underlings to properly manage this new authority and power.  Finally, there must be communication between the parties regarding the scope and degree of leadership being distributed.  At my school, we have the first component in place with a principal who is competent and willing to share power and leadership roles because he is overwhelmed.  The third point, communication, also exists due to the close proximity of the assistant principals and the fact that three of the four have been hired since he became principal.  Unfortunately, the second component of competent underlings, is not in place.  Our principal has tried distributive leadership and it has been unsuccessful and often has created more work for him in fixing the problems created by his assistant principals.  For distributive leadership to work at my school, new assistant principals need to be hired.  I see no other solution.