As Lollipop has showed, Volta and ART are not battery savers. If anything, people are reporting worse battery life than under KitKat.
Yet the GS5 shows dramatically better results. A number of handsets show dramatically better results. That you read someone's anecdote about their Nexus 5 is irrelevant.
Sorry, but I find your posts hilarious, and again I have to say that they're astroturfing. "I'm not going to go as far" -- sure.
Seriously, are people not aware that HN has been targeted?