This is extracted from the "Analysis" section:

Average review time 21284159 min, 1 sec
Standard deviation of review times 9 min, 13 sec
Quickest review 21284148 min, 7 sec
Longest review 21284176 min, 53 sec

Unfortunately, I'm using a xampp server, and I don't know where the **** can I access the mysql data, but I'd say the field timedownloaded is not stored properly.