There were rumblings in local media for a few weeks and then Marc Stein put out the report right before game 7. It was never totally clear, other than the fact that supposedly the front office/ownership group had very high expectations for what they wanted to accomplish this season. I think that the Sixers' front office and ownership group is a bit difficult to read. There are a lot of different voices all the time. Elton Brand is the GM, but oversees a team of advisors who were largely there before him. Josh Harris is the face of the ownership group, but there are several different high finance guys involved, so I think they all have their own levels of interest and opinions, many of which relate to the team's value and perception, not necessarily basketball. And also Scott O'Neill is kind of the money man as the president, always trying to ably and efficiently separate the good people of the Delaware Valley from their wallets on ownership's behalf.
so I would assume that someone among all of those people was leaking those reports for whatever their purpose was. Though I have no idea who it was really supposed to help by getting that floated before game 7. Would that really have helped the team win? Seems unlikely and I'm not sure who would have been helped by a loss. Presumably someone just doesn't think that Brown is the right guy to take them to the next level.