The detailed time stamp information from individual quiz responses would be very useful for examining study habits and identifying academic honesty issues. Academic dishonesty may be suspected if students answer questions too quickly, or if they consistently answer questions within a few seconds of another student. My quizzes are week-long homework assignments, so the quiz start/stop times are only somewhat useful.
I know that the time stamp data exists in Moodle because it's viewable when reviewing a particular student's quiz attempt, Unfortunately, it is not easy to compare the time stamp data from multiple students. What is needed is a new quiz report that allows a teacher to conveniently view and download all of the existing response time stamps (every question, every student, every attempt). Further data analysis can be done using other tools, such as Excel.
It would be best if the time stamp precision displayed anywhere in Moodle be to the nearest second, rather than the nearest minute. A minute is a long time.