I'm in the process of writing out my reading with Cookie from the audio. I read with her for an hour, I'm only at 18 minutes in and there are a lot of unfinished thoughts, and my timing prediction hasn't even come out in the reading yet. She made a statement about being able to hear someones voice that she couldn't hear in the beginning of the call, leading me to believe that the longer you speak with her the more she connects.
I would say that since her line is so long, read with her for as long as you can afford or until you feel satisfied.