That is why it is important to be mindful of a breed's historic reputation, paying attention to the description under "economic qualities". It is laziness to do otherwise. We do these birds no favors by not preferring productive individuals, good sized and shaped eggs, appropriate rate of growth, etc.
I have been frustrated by people scoffing at breeding to a Standard, and whether or not they could be a practical option. I do not get it. On the other hand, we need to be honest with ourselves. Many of our best looking strains, perform very poorly. Not all of them do, but is sometimes the case.
I have been unable to rationalize breeding a breed without a standard. Also, I do not see a standard description as an all inclusive directive on breeding poultry.
I agree with Walt. These breeds were bred to perform, so do we breed these birds to perform? We were much more practical then than now.
There are many points that are easy to identify that has no mention in the Standard. It did not have to be. It was largely known. Point of lay, age a bird gets to an appropriate weight, when they molt, how long they take to molt, egg size and quality, etc. These are all easy for anyone to identify and can be measured.
These birds should not just look as they should. They should do as they should. What good is a Leghorn that lays few eggs? A New Hampshire or Delaware that is slow to feather out and mature? A seven pound hen that lays medium sized eggs?
I have had and heard mention of pullets that come into lay @ 32-36 wks. It is mentioned as if it is some badge of authenticity concerning the label "Heritage". That sits well with me concerning some of the oldest breeds, or breeds that were developed for other reasons. For most farm fowl, I do not think that makes a whole lot of sense. I understand that we are starting with what we could, so I am not knocking them. Still that does not mean that it is good enough.
Most of the breeds and varieties that I am interested in were farm fowl, so I see them as farm fowl. I would like to see them perform like a good farm fowl. I believe that is a reasonable expectation.