Meh... disabling text-to-speech functionality on an e-book isn't as significant as they make it out to be in my opinion. If you wanted to hear a book, people would just buy and download audio books and throw them on their MP3 player which is cheaper, smaller and more capable than a Kindle. I'm pretty sure that the Kindle is marketed to people who would rather read than listen to an audio book. Just my two cents.
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