Just like to have a discussion on how big you can grow an auto with perfect conditions and lots of lights.
I believe for certain strains there have been official harvested of autos pushing 1.5 lbs per plant. But these are not typical. However yes, the short answer is there is potential. Especially for the home grower supplying themselves, people growing outdoors with short grow seasons.
For someone who knows what they are doing... With good auto genetics, 2-3 oz per plant can be common.