The thing with Nick is that I think he is very dialed in with agents, players, assistant coaches, and some Superdome Commission members, but I don't think he really has much in the way of front office connections. Nobody really does because they are notoriously tight lipped and only let out what they want to let out.
So if it's information that would only be known by people in the front office, he often times doesn't have the sources to know exactly what is going on. It's likely why he though McCarthy was under serious consideration. He was likely getting that from McCarthy's agent.
But he's usually good about saying when he thinks something based on sources or if he's just reading the situation and giving an opinion. It's the a later regarding Carr.