Jim Cramer says the major focus at the beginning of the Starbucks conference call was how there was a deceleration in traffic in the U.S. But Cramer says he would have choreographed it differently. He says Europe and China have been amazing markets, the gross margins are terrific, coffee prices did not impact the company and Starbucks is continuing to have global domination over the coffee business. However, he says there is a seismic shift in the American consumer's behavior and that a move toward mobile and digital are needed. On Thursday,the world's biggest coffee shop chain posted quarterly revenue that missed estimates on softer traffic. The company announced Friday that it plans to launch a food and beverage delivery service next year. Jim Cramer says buy Starbucks.