I think that they are way too optimistic then with their numbers. Or let's say it in another way; it seems that they just used the 8000 screen refreshes as a formula to calculate based on how many pages you turn a day. But the number 8000 is probably based on flipping all the pages in one go. Also the unit will maybe drain power even if it's off. It should be easy to measure since it has a removable battery.
I'm still thinking of buying one although I lean more to the Hanlin V3, but it would cost a whole lot more to get it here to The Netherlands.