It has not been much time since the release of the newest major upgrade version of Android, the Android 5.0 Lollipop. Only a few devices are running on it, and what we can see is a minor update version of the same, the Android 5.0.1 Lollipop shows up on AOSP. Google has pushed the version to Android Open Source Project, and the factory images are also available.
The build which is currently being pushed is LRX22C, and is only available for selected Nexus devices. This new update by Google does not have any major changes in the Lollipop, it is just a minor update which is a bug fix version of the 5.0 Lollipop. The users of the Nexus devices were complaining about several errors (especially the error 505) and bugs in their devices, as soon as they updated to the Lollipop. The bugs (reportedly the problems in camera, removal of silent mode, trouble tethering to Wi-Fi modems, problems in app switcher and SMS apps), which were experienced by the users after the update to 5.0 Lollipop, will hopefully be solved now.
The Nexus 7 was one of the devices which had the highest number of bugs, and that might be the reason for Google to push the update soon enough, and that too only for the selected devices. The devices which are listed are Nexus 9, Nexus 7 (2013; WiFi only) and the Nexus 10. Other tablets, even the other versions of 2013 Nexus 7 won’t get it right now.
The devices can be updated through flashing the factory images, and if you are not particularly used to this, you can also check the OTA updates by going to “Settings >> About Device >> System Updates >> Check now” in your device running the Android 5.0 Lollipop. OTA updates will however, still take some days to arrive. We will keep you notified about any further information available.