MPU6050 Gyro Bias

Hi,
on the PS for the MPU6050 IMU I've read that the
GYROSCOPE ZERO-RATE OUTPUT (ZRO) Initial ZRO Tolerance 25°C is ±20 º/s.
So, does it mean an initial bias of 20°/s?. Since it seems too much (well, in my opinion), I would ask you if I misunderstood and I have to consider some other parameter in order to know the typical gyro bias (withou using the DMP of course).

Thanks,

Alessandro