ProjectWise i-model Composition Server for PDF supported OS?

Whilst I understand that the supported OS for ProjectWise i-model Composition Server for PDF is Windows Server 2008 R2 SP, Standard and Enterprise Editions(64-bit), in the PW Implementation Guide, it discusses prerequisites for both Windows Server 2008 and 2012.  Is 2012 therefore actually supported, or is this an error in the Implementation Guide?