Taylor & Francis has released the Taylor & Francis Open Access Survey June 2014.
Here's an excerpt from the announcement:
In the first few months of 2014 Taylor & Francis carried out a worldwide survey, with the aim of exploring journal authors' views on open access.
Having previously conducted a survey on open access in 2013, we have been able to see how authors' opinions have developed, and whether the discussion and debate on open access has helped to inform and shape views.
Digital Scholarship | "A Quarter-Century as an Open Access Publisher"