I was thinking the same thing , should be closer to that oz. Depending on how much veg time you give them and if you do some training on them you might get more.
I absolutely don't worry about yield. Yield is something I may momentarily consider when choosing the strain, after that I just do the best job I can given what I have.
Its probably different when you have space because you can consider different methods, strains, veg time or bucket size ... for me, my height restrictions set what plants I can grow etc etc. I just pick the best short strains now and go with it.
I think 1oz+ should be easily achieved in a gallon bucket with 2 weeks veg ---- Im just guessing here, someone else will know.