I'm not sure it's the main sticking point, I mean I looked at a lot of Nexus 6 reviews because it was the handset I had intended to buy if it got good reviews (I've bought a Nexus S, Nexus 4 & Nexus 5 in the past) and the things which put me off in the reviews were the poor camera and the disappointing battery life. With the increased price I think it was safe to assume that a better camera would be included but it still takes forever to focus compared to rival handsets and my mind boggles that a 3200 mAh battery has been disappointing to so many different reviewers.
I unplugged my iPhone 6 plus at about half past three this morning. I've made several phone calls, sent and received 20 or 30 messages, dicked around on Vine and Instagram, spent a good hour browsing Reddit and the web and listened to mp3s for almost five hours. The battery is sitting at 43%. I've never known anything like it and as far as I can tell it's leagues ahead of the Nexus 6 on that front.
I certainly don't have a batteryproblem on the nexus6. Unless I do something insanely stupid I'm somewhere between 60 and 70 % when I go to bed. God knows what those testers do to it. Not saying it's better than the Iphone but a problem it is not.