Galaxy S3 with 4.1 - Google Now/search text to speech not working

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http://androidforums.com – Just ran the updated to the latest version of Android. I was quite looking forward to playing around with the new Google search voice functionality. I have no problem getting it to recognize my voice and perform commands however the app doesn't talk to me. It always displays the information on my screen. Also, does anyone know of a way to default Google Now to open instead of S-voice when pressing the talk button on a BT headset? Thanks! (General)