I'm not assuming that her mind is working faster than her mouth, and it doesn't sound like that to me. Something like that might cause stammering, but not (in my layperson's opinion) repeating something over and over without being able to find words to express a feeling or thought.

The listening comprehension score might be accurate. Does she have any history of hearing problems? Infections necessitating tubes, etc.?

Striving to increase my rate of flow, and fight forum gloopiness. sick