Actually, I think your right. Pulled the following from:
Symptoms of Worn Wheel Hub Bearing | Wheel Bearing Warehouse
Here are some indicators of a worn wheel hub bearing or other wheel-end damage:
Grinding when the vehicle is in motion.
Typically, this means there is mechanical damage in a wheel-end system. Related to a bearing, it means a loss of integrity such as roller or raceway damage. The noise is normally heard when turning or when there is a shift in load.
Humming, rumbling or growling.
These noises are normally associated with tire, electrical or drivetrain components. If bearing-related, the noise or vibration is present when driving in a straight line, but intensifies when turning the steering wheel slightly to the left or right. Typically, the side opposite the rumbling is the defective side.