Just installed Civil 3D 2013. When I use the _AutoCAD Civil 3D (Metric) NCS.dwt as a template i end up getting mixed units. For example the attached jpg shows what is happening in the profile label for the sag only style. I don't have an issue fixing it if it happened once, but this has been going on since version 2007. There are a couple of others spattered througout the dwt file. I wish that AutoDesk would fix simple things like this before sending out their updates. Maybe it could be included in 2014 or in SP 2 for 2013 and earlier versions.
The other issue is that the number of decimal places in metric is 3 (nearest millimeter) which would be a closer match than the 2 (nearest centimeter) to the 100th part of a foot in the imperial template.