Studs and Duds – Los Angeles Auto Show: Sometimes an automaker unveils a new car to hoots, hollers, applause and cheers. Other times, crickets chirp as the assembled journalists look around nervously, their eyes asking each other, “Do we applaud now?” Hey, they can’t all be winners, but many are, and to help you separate the two we present our list of Studs and Duds for the 2007 Los Angeles Auto Show.