Yes so far, 5 hours off the charge, im at 45%. First two hours stuck on 100% and then next 3 hours, drained down to 45% with wifi on, nfc off, bluetooth off, nokia drive off, only weather and battery status app running in background. Only the people app and me tiles on for live tiles. One email synced to as they arrive and 3 others on manual.
Pretty crappy, but this time with the 900 with pretty much the same or even more usage, i would have probably 60% at least left. I would have the same settings i have now with 920, but like 3 emails set to as they arrive and i could considerably less battery life.
I will wait a few more days, if not, going to get an exchange. With the odd estimated time, even if you turn on batter saver, the estimated time doesn't even change like it did with older windows phone models, which is odd. I actually believe i have lower than the 45% that is showing now on my phone since my phone died at 13% yesterday.