I think cperciva may have been a touch overenthusiastic, but surely this is in fact proving his point? His claim was, as you note before trying to ignore it, about coordination. When one of the recent Linux LPEs broke, the fix wasn't in distro packages yet; there was a vulnerability that users couldn't practically do anything about. This is an LPE that is fixed in the binaries that have already shipped. If I was playing cheerleader, this is exactly the case I'd use to argue that FreeBSD being a single unified system is a win and that its approach to handing security problems is very on top of things.