Sadly, the text-to-speech abilities of the Kindle were crippled shortly after launch following complaints from the Authors' Guild of America that the text-to-speech functionality in the Kindle 2 -- which promised to bring the benefits of electronic books to blind and partially sighted people -- were infringing authors' rights to be paid a separate royalty for all verbal performances of their works.

This disagreement -- which saw Amazon head off a lawsuit by making the text-to-speech capability controllable by e-book publishers via a flag which disables the functionality -- is directly responsible for the DX's main failings, at least according to the director of libraries at the University of Wisconsin-Madison Ken Frazier: "the big disappointment [in the trials] was learning that the Kindle DX is not accessible to the blind. Advancements in text-to-speech technology have created a market opportunity for an e-book reading device that is fully accessible for everyone, [but] this version of the Kindle e-book reader missed the mark."

Dr. Marc Maurer, President of the National Federation of the Blind, is even more scathing in his disdain for the device: in a statement regarding the use of the Kindle DX in education as a replacement for traditional textbooks, Dr. Maurer states that "it is our position that no university should consider this device [the Kindle DX] to be a viable e-book solution for its students."