That was quick! Just yesterday a soak test for Android 5.1 Lollipop on the AT&T version of the first generation Moto X started rolling out. The test must have gone well, because they already started pushing out the final update this morning.
Sound off if you own this device on this carrier and let us know what you think of the update.
Don't forget to check out our dedicated Moto X 2013 section here: Motorola Moto X Android Forum at DroidForums.net