In the installation path of Publisher is the Publish Annotiation Table localised (C:\Programme\Autodesk\Inventor Publisher 2011 R1\Help\Autodesk_Inventor_Publisher_PublishAnnotation_Table.mht). Therein is among other things this behaviour listed.
As you probably already know DWF and ADR does not have support for all the annotation styles that we have in Inventor Publisher. When we publish to DWF we try to degrade gracefully to the closest available style in DWF. Hope that answers your question.