You must have a very unusual situation, because the Jersey Giant will lay about 3 eggs a week on average in a year, while the Rhode Island Red will lay 5 eggs on average in a year and the Leghorn will lay about 6 eggs a week on average in a year.
Maybe your Rhode Island Reds and Leghorns are poor egg-layers and your Jersey Giant is an exceptional egg-layer.
But this is not how it usually works.
i got to differ. my giants do just as well as my reds also.they lay at least once a day and I have a few that will go 2 a day. pretty dang good I would think.