PR Rule #1
If down the road it turns out Steve was lying and someone from the SEC or some lawyer in a civil suit wants to find out what was said in that conversation, they’ll have to subpoena Joe Nocera, and the New York Times will fight that request. Even if Joe Nocera wants to tell the world what Steve Jobs told him, he can’t. He made a deal. He went off the record. Even if Steve turns out to be lying, Joe Nocera is stuck.
Thus Steve Jobs gets to protect his stock price and give Wall Street the message that he wants them to hear, and should any of this turn out not to be true, well, Steve and Apple now have Joe Nocera and the legal department of the New York Times to act as their ally and firewall.