November 2012
NVDA 2012 and accessible PDF tables
It's no exaggeration to say that the recently released NVDA upgrade is a huge step forward for PDF accessibility. With respect to tables, NVDA now matches JAWS in almost every way that matters, and in some respects it is significantly better. NVDA is now a realistic alternative to JAWS.
April 2012
PDF Accessibility Testing with JAWS, NVDA and Window-Eyes | Accessibility Chatter
So I decided to analyze the three leading screen readers for accessing and testing PDF accessibility. Different elements, such as document title, headings, images, bookmarks, tables, forms, lists, and links were tested with each of the screen reader to understand what were their interpretation and how well did they read a tagged PDF file.