Advertising agencies across the nation reacted with shock Monday, when the U.S. Census Bureau revealed that the mean age of the 'twentysomething generation' is now 35. According to the report, the twentysomethings are no longer 20- to 29-year-olds who wear ripped flannel shirts and 'hang out' on college campuses. Most are now married and have full-time jobs. Todd Leaks, an Austin-area twentysomething, recently turned 36. 'I was 28 when that book Generation X came out,' he said. 'Man, that was a while ago already.' Labels previously ascribed to the twentysomethings, such as 'Generation X' and 'slackers,' have now been transferred to those Americans born between 1968 and 1977, who have also adopted the clothing styles and musical tastes of the twentysomethings. 