You're old school Fred. The Germans went to negative camber way before the US did. Negative camber is the only way to go for daily drivers, and all cars. Tire wear is superior.No one would purposely make them go negative unless they were racing.
Correct.In my experience, toe in wear will favor (wear)the outside edge.
Extreme toe in will "shingle " the tread right across. (rubbing your hand across the tread will be smoother in one direction than the other.
Toe OUT will favor the inside edge more.
Extreme toe out, again shingling the entire tread but in opposite direction.