Why hasn’t Qaeda announced a successor to bin Laden yet?

Saif al-Adel, the former Egyptian military officer and onetime leading member of the Egyptian Islamic Jihad group (EIJ), is widely reported to have been chosen as the temporary head of Al-Qaeda, until a new emir is chosen to replace Osama bin Laden. However, this alleged appointment has not yet been announced officially by Al-Qaeda.
Al-Qaeda Central has made two public announcements since bin Laden’s death. The first was the confirmation of bin Laden’s death, and the second was the release of an audio recording which bin Laden had made a few days before his death, commenting on the ongoing Arab revolutions.
These two releases prove that Al-Qaeda was able to continue its media work despite bin Laden’s death, and in spite of their likely concern that the Americans may have gained important information from the Al-Qaeda leader’s compound which could allow them to go after other figures in the group. But the lack of public statement about al-Adel’s appointment raises one inescapable question: Why wouldn’t Al-Qaeda be able to go “official”‘ with a statement and an audio tape announcing al-Adel’s appointment instead of remaining silent about such a crucial decision at such a crucial time. More.....