There is no way Doctor K or anyone knows what will transpire at the FDA meeting today. He's just being conservative in saying last half of October for the update. He's always been a straight shooter. Do you honestly think if something positive comes out of the meeting today that he will sit on it until the later part of October?? Highly doubtful he would.
However it could go like this: a tweet concerning what transpired at the meeting early next week stating positive outcome and standby for more details in the update (QandA) to be released the later part of October.