With all due respect, Anak, that analysis isn't quite fair. Yes, the Kobo Aura takes fractionally longer than some other devices to change the page (although it does so very quickly) -- but it does so in a way that eliminates the annoying page flash that many people dislike in other ereaders.
Also, the Kobo Aura is the only E Ink ereader with a bezel flush with the screen.
One problem with numerical scoring is that it doesn't capture subjective realities (like, for instance, that the Kobo Aura has a much nicer feeling back than does the Kindle PaperWhite); nor does it take into account one-of-a-kind features (like the flat bezel or the flash-free page turns. (Also, "short battery life" is almost meaningless when you say it's good for "only" 13,000 page turns.)
Another problem with numerical scoring is that it makes subjective assessments seems like detailed analyses: things like "features" and "display" are personal opinions, not stop-watch timing scores.
I have a Kobo Aura; it's a fine device.