Hi Ryan,
Exchange plugin from C4D R13 to AE CS5.5 (which is free to download from Maxon’s website) works fine for me in CS6. I haven’t tested out the export plugin that reverses the process but I don’t see any reason for that not to work either.
Maxon gives quite big importance to AE integration so I believe they wouldn’t miss out an updated plugin for CS6 if the previous one didn’t work.
Furkan