For luxury marketers counting on their most affluent consumers to see them through the current economic crisis, evidence is mounting that even the most wealthy shoppers can’t provide them protection.  A new Unity Marketing survey of luxury consumers fielded October 3-8, while the stock market was in free fall, found that ultra-affluents who represent the top 2% of U.S. households are changing their lifestyles and shopping behavior.  On a year-to-date basis the ultra-affluent consum...