The following was written by my SpaceRef business partner Keith Cowing after he attended Mike Griffin's first press conference.
"Mike Griffin met with the press for the first time on Monday - after only 3 days on the job. The obvious difference between Griffin and his two predecessors is that he had a deep understanding of the issues facing the agency the moment he was sworn in."
"The rocket scientist/engineer in Griffin clearly stood out. When he knew something abut a topic - he was straightforward and to the point in his responses. When he did not know enough about a topic to comment, he admitted so, and said that he needed to study up before responding. Engineers like facts. Griffin clearly does not like to speculate at least in public."