Incorrect. While I'm fairly sure the FAA won't certify anything piloted to fly that has adverse roll on rudder input, it's not hard to do with a model. The effect you describe is present and non-zero, but can be over-ridden by other effects, such as the change in AOA due to side slip. And if you use enough anhedral, you can cause the outboard wing to have enough of a lower AOA to cause the plane to roll opposite of the rudder.