Only Apple could sell 5 million iPhones in three days and be a disappointment for Wall Street’s number-crunchers. The Cupertino Calif.-based cash-machine’s new mobile phone debuted last Friday, and consumers lined up around the block — around the world — to purchase the new device. In the Soho neighborhood of New York City on Friday, a line more than 100 deep snaked around the corner at noon. “The iPhone 5 didn’t make my iPhone oboslete,” a NYC tech reporter remarked to me. (She was granted anonymity becasue she is not authorized to speak to the press.) “All the people who are upgrading on the first weekend are cell-phone junkies.”