I recently got an Apple Watch Series 2 and discovered the "Hey, Siri" feature, where you can talk to Siri hands-free after raising your wrist. I know Apple made very clear statements about the privacy of "Hey, Siri" on iPhone - no recording is sent anywhere until AFTER you have said "Hey, Siri". I couldn't find equally clear statements about the privacy of this feature on Apple Watch.
I am wondering if Apple Watch sends an audio recording to the Apple servers every time I raise my wrist. Does anyone know of any official statement from Apple about this?