A successful organization has one major attribute that sets it apart from unsuccessful ones and that is dynamic and effective leadership, what do you think?

The assertion is true. Dynamic and effective leadership is a source of competitive advantage - an internal factor that enables the organisation to have market leverage over it's competitors on a sustainable basis. In these modern times, dynamic & effective leadership is very crucial in Business success & prosperity where different or various leadership qualities & techniques  must be displayed, consequently updating them to match the dynamic global village. 

The best leaders are also the best followers. One who cannot follow, can not lead. Having said that, effective leadership is about living the values by walking the talk, and being a real life example by demonstrating the right behaviors at all times.