It's more about culling and replacing than an initial choice. One good season does not make a good queen, what is she like the following year? You have to allow this time if you want to assess your stock and work with the ones that prove to be better.Generally speaking it is true (isn't it?), that the egg laying of a queen declines with age. There are exceptional queens of course. They remind me of hens in that respect, but there are exceptional hens. If you offered me a point of lay pullet or the two year old hen, I'll take the point of lay, except if the two year old was an exceptional layer and I was interested in breeding from her. Generally speaking, at the commencement of the first brood cycle, it is best for the queen to be young.