That seam’s true but I would think most thief’s would either take the car for a joy ride or drive it somewhere to be striped down... That being said I know that if your car has being started or even if you disconnect the battery without dis-arming the system that with in a min you would receive a phone call from quick track confirming your car and they will dispatch a guard or police to intercept the vehicle..
Now I don't know, if the car has being driven to an underground location if they can still track it, but they would need to be very quick about it because they will respond very promptly.