I don't know about GLW and Partridge Rocks, but My Black Sexlinks and Gold Sexlinks lay 6-7 days a week. I have other breeds but not for their egg production but for their looks. It seems to me that the more elaborate the chicken the less eggs they lay per year (majority of the time). That is just what I've seen. My game chickens are the most beautiful to me but yearly lay the least. I would say if you are willing to give up 1-2 eggs a week go for the looks. But how many eggs a breed will lay is the average. Well taken care up hens can be high egg producers regardless of average.
Example: I have two Sussex hens 1st hen lays everyday except maybe once a month and 2nd hen lays about 5-6 egg per 7days. Defiantly more than the what is expected of them about 4 eggs per week. Hope this helps

