DXF/DWG Export Wizard will not export text and dimensions.
Solution
Resetting the dialog memory in the AutoCAD DXF/DWG Export Wizard resolved the issue. This can be done bu clicking the 270 degree arrow at the top right of the AutoCAD DXF/DWG Export Wizard dialog as pictured below.

Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: TRANSLATOR
Version: V11.0.2
Function: DXF_DWG
Ref: 001-9302815