Typically tweets should be but the existence of a test device that was handed out to employees, but could not release any specific details on the product. Here's Google's statement:

"We recently came up with the concept of a mobile lab, which is a device that combines innovative hardware from a partner with software that runs on Android to experiment with new mobile features and capabilities, and we shared this device with Google employees across the globe. This means they get to test out a new technology and help improve it."

Rest assured, the tweeting sources say more information on the phone should be coming in the next few days. In the meantime you can monitor the conversation on twitter: