On Monday, Jobs was quoted in a press release on Apple selling one million new iPhones in three days. The WSJ reported today that even if Jobs does return to Apple, COO Tim Cook may keep the extended duties he took over while Jobs was on leave. Indeed, now that Cook’s shown that he can run Apple, analysts are now worried if he will leave. In the past, he has been approached by several big tech firms including, reportedly, Motorola (NYSE: MMI) and Dell. Piper Jaffray analyst Gene Munster told the WSJ, “At this point, losing Tim Cook would be a bigger deal to investors than if Steve Jobs stepped aside. Just that thought makes my stomach tighten up.”