NEW : Warren Buffett , Apple 's CEO , returned to work several days . `` Jobs , for all of his virtues , clings to the Great Man Theory of Leadership -- a CEO-centric model of executive power that is outmoded , unsustainable , and , for most of us mere mortals , ineffective in a world of nonstop change , '' he writes . NEW : Jobs will be in the office several days a week and also working from home . Apple , 54 , a cancer survivor , has been on medical leave for several days . Bloggers say Jobs should release more information about Jobs .
NEW : Warren Buffett , Apple 's CEO , returned to work several days . NEW : Jobs will be in the office several days a week and also working from home . Apple , 54 , a cancer survivor , has been on medical leave for several days . Bloggers say Jobs should release more information about Jobs .