Edit: Now I'm getting absolutely no increase whatsoever. I'm back at 20 for laughing gas per batch.
For example:
I used to be able to make 40 flour at a time. Now I can make 48.
48 is not 1.5 x 40, it is 1.2 x 40
Same with my transforming items, Laughing Gas I used to be able to make 20, now 24. Also 1.2 x 20.
So either the wording is wrong or a digit got mis-typed in the update ;)
("batches which are 50% larger than standard batch sizes." " batches 50% larger than factory specs.")