I'm still running firmware version 4.2.811 on my Aura One--and my reading stats have been very inaccurate since I got my reader. I've had my reader for about 45 days now (received it just after the first of the year) and it currently shows that I've spent a total of 315.4 hours reading. That equates to about 7 hours a day. I'm lucky to get 1/2 an hour a day reading time during the week and maybe 1 hour to 1 1/2 hours on the weekend. So a more accurate number would be 35-45 hours total reading time. I just laugh when I check it. Right now I'm 49% through with the current book I'm reading, and the reader shows that I've spent 22.9 hours reading the book and have about 4 hours to go.
(The 4 hours remaining seems fairly accurate.)