Naughty Dog's Christophe Balestra tweeted a picture of a mountain of boxes. More specifically cardboard boxes containing 120 PS4 devkits.
"Look at what arrived today at Naughty Dog... 120 more PS4 devkits!"
Obviously Naughty Dog have had devkits since a long time as one of the premiere first party studios under Sony's roof, but now it seems the entire team will enjoy the benefits of a devkit at their desk.