There you go, first signs of Lumia Amber release is out.

Lumia Amber update release Telstra Australia

In the above message, Telstra representative clearly states the Lumia Amber/GDR2 update for Lumia 920 will go live on the morning of 16th Aug i.e. tomorrow. That’s good news for Lumia 920 owners out there in Australia

The update was approved on 5th Aug by the Telstra team which again strengthens the notion that the update is well ready for a Global release soon (atleast for Lumia 920 if not all devices).