Some aspect of vibration sensing has to work already. Otherwise they would not have released the hardware. If they did release the hardware, and vibration sensing will never work on it, then they open themselves to lawsuits based on false advertisin…
Yes, the original information said that it would have a vibration sensor.
Their image, still on Kickstarter, shows a rule that states "is knocked".
Internal accelerometer (for vibration, impact, and motion detection)