Time Magazine: It could be a sign of just how traumatic 2005’s Hurricane Katrina was that when Hurricane Gustav failed last week to fully pulverize New Orleans, it was news. The fallout from Gustav was relatively limited, but it was still a major storm, with maximum sustained winds of 110 m.p.h. when it made landfall in Louisiana — strong enough to cause an estimated $20 billion in damages. And Gustav won’t be the last this season. Hurricane Hanna gathered strength in the Atlantic last week, and Ike is …