I have not had any voice response on Google Now since I got my Note 2 a week ago. S voice works fine. Before I start to try and get technical help from Samsung I thought I would check here to see if I was the only one with this issue. Thanks
Finally got the answer to my problem. I am posting it here so any other folks that have no voice response from Google now will be able to fix it. As it turns out Google Now for Jelly Bean requires the system language to be set to "English United States" and no other English version. I live in Canada and my phone was set to "English Canada" I installed the app Locale Select and switched to US and Google Now will respond with voice when appropriate.