I guess for me, I appreciated when she did that, because it showed me she was actually listening to me - since we talked on the phone, there were no visual clues that she was paying attention. On the phone, if she didn't do that, I might have wondered if she was oh, playing solitaire on her computer instead of listening to me or something. I'm quite amazed at how she (appeared to anyway) stay focused and didn't wander off mentally during our phone calls.