I am at 73% after 5h 35m on battery, but have had the screen on for 1h 45m(46%) and have had Google Play Music downloading from WiFi the entire time. It downloaded 8.46GB. My phone has been on auto-brightness the entire time, but have been inside almost all day. With those numbers, I should be getting 14.09 hours of screen-on time. (105/(.46 * .27)/60).
Very pleased so far. Tomorrow I will be able to use it a regular amount without so much downloading and screen time and see how long it actually lasts. Now that my downloading is finished and I'll be working the rest of the day, I feel like I'm not going to be able to discharge it all the way until tomorrow.