I have been reading about the Kobo Touch and it seems it has the same problems that the nook with the ghosting. A kobo spokesman is saying that they will add a setting to adjust the refresh rate in their first software update. Hopefully, B&N will do the same. So it seems to be definitely software-related. I will hold on to my nook, I like it too much to give it up because of the ghosting and I am confident they will fix it.
https://www.mobileread.com/forums/sho...d.php?t=138693