How do people want to chat?

I just took a look at google wave video. It is a technology that involves a lot of new things but I only want to discuss the real-type feature.

In this image the user “Casey” have not completed yet her text and the participants can see in real time what is she writing. In the video the presenters explain that one will have the option to disable this.

I wonder how much users will like this. I am an active user of google talk, which is embeded in my gmail account. Some months ago they included the real voice and video chat options, but it seems that no many want to use them. I think this reaction might be explained because people do not want real time communication. Indeed I think that the success of social interaction and improvement of social skills using digital media is due to people’s preference of taking time to wonder what they should or want to say. I am skeptic to the success of this in my specific culture/context/generation. But at the same time I want to see of teens/others react to this, they could like it a lot.