Several of us have noticed a significant battery drain even in airplane mode, > 1%/hr . Typically, we've seen >10% discharge overnight.
Here is an example. Put it in airplane mode all night and had location services disabled. Here's the result, > 1%/hr drain. This was with Google Play Services 4.1.
This thread is to collect our observations, experiences, and hopefully find a resolution to this annoying issue. The MOTO G should, in theory, have bad-ass battery life.