Well, I just listened to the press interviewing the triers-of-fact in this case; one of the questions most interesting to me was (paraphrased) "What was it that convinced you that Michael was innocent?"
Oddly enough, none seemed able to name anything that stood out as the lynch-pin of the defense's case. As the investigator for a prosecutor's office, I myself have polled jurors when we lost a case; if you don't learn from your mistakes, you never improve. Each of them could articulate something in either the defense or prosecution case, that caused them to vote for conviction or acquittal.
If I had gotten non-answers like what I heard on the radio awhile ago, I would be inclined to believe that the jurors were leaning on their opinion of the defendant, rather than the evidence as presented.
Or, they were just nuts.