NBC NewsWire/Peter KramerFrom left, Cara, Kate and Mady Gosselin talk a little bit with Todays Savannah Guthrie. It was a couch full of awkwardness Thursday on the Today show when Kate Gosselin sat down for an interview with her 13-year-old twin daughters Cara and Mady. The kids clammed up for host Savannah Guthrie and refused to answer questions directed at them. But backstage, it got pretty loud, Confidenti@l has learned. Guthrie was met with radio silence on air when she asked the girls about their recent People magazine cover, in which Kate claimed all her kids were doing well, even with her very public divorce from Jon Gosselin and a life growing up on reality TV. Despite Kates attempts to force their mouths open and have words come out, saying, Its your chance, spit it out, to her girls, they insisted on staying silent, which was painful to watch. This is the most wordless Ive heard them all morning, Kate said through clenched teeth. I dont want to speak for them but,...