Then they should have posted "late October" not "October". I never saw the original post but found the comment petty as written.
My comment? With the big winky face at the end? C'mon...this is a speculation thread and we're all having fun here. The fact that some of us said 13 at release and 13.1 right after were obviously just guessing. We can gloat for 1/2 second though.
EDIT: and to be fair, the poster did not say "late" October but said at the Apple October event (which has never occurred in the first half of October and is typically during the last 10 days of October).