Based on a qualitative and quantitative study, the EU Network PASTEUR4OA has recently evaluated the FWF Open Access policy as one of the most effective policies of a funding agency.
That is now confirmed by a Science Europe survey. It shows that FWF plays a leading role in almost all fields of Open Access.
Science Europe (2016): Open Access Publishing Policies in Science Europe Member Organisations. Key Results from Science Europe and Global Research Council Surveys.