On the GH home page, the Real Mileage Database chart still shows the TCH mileage varies from 35--39mpg, and Prius II from 45--50mpg. Does it update to show current entries in the database?

I ask as there are several TCH owners that are well above 40mpg for 3,000 miles in the database, and Prius II owners over 60mpg.

The 35 to 38.9 represents the middle 50%. If you throw away some of the extremes (the lower and upper 25%), that is what you get.