Later images seem to show more of it surviving!
It looks like it was dimming before it went behind the Sun. I wonder if all the material simply burned off rather than being blown apart.
CANCEL THE EULOGY ... FOR NOW: Comet ISON flew through the sun’s atmosphere on Nov. 28th and the encounter did not go well for the icy comet. Just before perihelion (closest approach to the sun) the comet rapidly faded and appeared to disintegrate. This prompted reports of ISON’s demise. However, a fraction of the comet might have survived.