djjoshuad:
The GS3 and the Nexus 7 can both recognize the Due with ADK 2012, I've tested with both. Are you running a custom ROM or kernel? Perhaps one that leaves out USB accessory mode?
I use stock rom with rooted.
The GS3/Nexus 7 recognized the Due as "connected to a USB accessory". But ADK 2012 couldn't recognize the Due.
Connection:
PC-->USB Cable-->Programming Port on Due
Nexus 7/GS3-->USB Cable-->OTG-->Native Port on Due.