First step:
Pass your mouse over where it says 'Ratings' and you'll get a small pop up box that gives you a breakdown of the hidden feedback.
Second step:
Copy her AW membership number, you'll find it towards the bottom of her profile, it looks like this;
External Link/Members Only806471and then paste it into the Search box her, any mention of that profile number, good, neutral or bad, will be found, and she can't hide that.
If you are still interested move to the third step:
Email her and ask her why it is hidden.
Await her reply, one girl told me that some dick had put her real name and address in the feedback and that AW did not seem to want to edit it out for her. Any easy lie to send but I thought she looked good so I took a 30 minute punt to find out. It was worth the risk as she was really good.