Perrone, I saw your post regarding better focusing with D800 than D600 in low light, but I would still assume the D600 is better than other camera's mentioned. I wonder if it is something specific to the lens.
I have had no problems in low light in general, I think it focuses better in low light than my other bodies.
"Cameras and lenses are simply tools to place our unique vision on film. Concentrate on equipment and you'll take technically good photographs. Concentrate on seeing the light's magic colors and your images will stir the soul." Jack Dykinga