Hi Lance,
I would argue that this doesn't belong in the gradebook. The gradebook is already very complex, and adding non-grade information at the activity level would only exacerbate that. My intuition is that you want to look at the data from a number of quizzes longitudinally. Perhaps someone else can chime in as to the feasibility of a report of this type, but I'm thinking the Quiz forum might be a good place to research or post.
Mark