To be fair to Ubisoft, the practice of making game reviewers hold back reviews until after a game launches has been going on for a long time. Hell, Destiny reviews were held back so that Bungie could rake in a half a billion dollars before the public was able to read reviews of the game.
so I recently upgraded from a N4 to the N5. After two charge cycles, the N5 seems to be performing far worse than my N4 (both stock unrooted). With my N4, I could usually get 14 hours with 3 hours SOT (all on wifi). With the N5, I can't get more than 12 hours with 2 hours SOT (all on wifi).