Kyle Neubeck reports that Jerry Colangelo was the reason for the delay. From The Philly Voice:
With one of the stranger sagas in Philadelphia sports history coming to a close, the Sixers are left to prepare for what may be the most important offseason in franchise history with the lead decision-making role wide open. The delay was, in part, due to internal and external politics that ownership had to weigh. More than one person who spoke to PhillyVoice on the condition of anonymity suggested Jerry Colangelo tried to intervene on Bryan’s behalf, threatening to interfere with club relationships around the league.
I suppose this means Jerry is no longer a special advisor to the team?
UPDATE: Joshua Harris denied this report at the press conference.