Last night at around 5-6PM CT, the Android 5.1 update to Lollipop started rolling out to Nexus 5 devices. The version is LMY47D, and brings the usual bug fixes and performance enhancements that we have already reported for the Nexus 6 with Android 5.1. Technically, the factory images for Android 5.1 showed up on the 11th of March, so the OTA rolling out now seems to be right on schedule.