The FCC reverses it’s former position on EAS text to speech, permitting stations to begin using it today (May 7, 2012). The FCC’s main issue with Text To Speech (TTS) was that it may not render the text accurately enough to be understood, especially in emergencies. This can lead to confusing messages and defeat the purpose of EAS altogether.
I have played around with some text to speech software and indeed it can mangle words, mispronounce punctuation as a part of the sentence structure, mumble, etc. Further, as I have said before, listening to some robo voice is very impersonal. But, I suppose that is the point, isn’t it; some big government agency computers generating messages that no one person is really responsible for. Bureaucratic paradise.