Eu finalmente consegui encontrar evidências para provar que a versão RTW foi lançada.
The download page for the Open XML SDK 2.5 for Microsoft Office is now providing the RTW version of Open XML SDK 2.5. You can use this version for production. We are now updating the documentation in MSDN. Until the publication of the updated documentation, please refer to the SDK document in Productivity Tool.
The differences between the CTP and the RTW versions exist in the classes of "Office15", and those are renamed to "Office2013". Also we are preparing a set of sample code demonstrating how the classes can be used.
Regards,
Kazunori Matsuura Open XML SDK 2.5
Open XML SDK 2.5 para Microsoft Office