Add question title to rating
In my surveys i used a description text as in your suggestion. I only thought it would be semantically correct to put the question text into the question itself. Otherwise you will get an empty question in your survey report as result.
BTW: I like your survey page allot. Much better than any other free in the web.
Allan Ebdrup commented
You can add question above you rating question, and choose descriptive text. But you might have a point with your suggestion. Maybe there should be a leading descriptive text for rating questions, by default.