The search engine giant in a tweet confirmed the rollout; though the company has still has not revealed an exact time frame for the availability and says, "Will soon be available on most Nexus devices."
9to5mac points out via a Google product forum that the Android 5.0 Lollipop update is currently only rolling out to the Nexus 5, Nexus 7 (2012 and 2013) Wi-Fi only models and Nexus 10. The forum notes, "The OTA update for 3G/LTE versions of the Nexus 7 2012 and 2013 have not yet started, nor have they started for the Nexus 4."
(Also See: Android 5.0 Lollipop Review: A Sweet Upgrade)
Motorola, on the other hand, announced the news in a blog post and said, "We've started to roll out Lollipop in phases just a week after the public release of the software to the following devices in the US -Moto X (2nd Gen.) Pure Edition, Moto G (2nd Gen.) US GSM, and Moto G (2nd Gen.) Global GSM retail versions sold in the US."
The company further promises that it is "working hard with carrier partners" to bring the update to more devices.
The company had last month promised the Android 5.0 Lollipop update for the Moto X, Moto X (Gen 2), Moto G, Moto G (Gen 2), Moto G 4G LTE, Moto E, Droid Ultra, Droid Maxx, and Droid Mini smartphones without giving much details on timing.
Additionally, Google has also released factory images for the Nexus devices - Nexus 5, Nexus 7 (2012 and 2013) Wi-Fi only models and Nexus 10 - that are receiving the Android 5.0 Lollipop update. There are no factory images for the Nexus 4 and Nexus 7 (2012 and 2013) 3G/ LTE models yet. However, we can expect Google to start rolling out Android 5.0 Lollipop to Nexus 4 and Nexus 7 3G/LTE models soon.
Last week, the already announced global rollout of Android 5.0 Lollipop was reported to be delayed till November 12 due to some 'outstanding bugs', which was later speculated to be a battery-draining Wi-Fi bug on the Nexus 5.