Anyone who claims they are getting 8s or 9s from a wheaten marans in the US is not likely using the French standard. It is also unlikely to consistently get a 7.
I have hatched hundreds if not thousands of Marans over the years from many different breeders and many different lines. Although I consistently get 5s and an unusual 6, wheaten generally don't produce 7s to 9s anywhere, let alone the US.
For reference, a 9 is the color of a dark chocolate bar. Directly from the French standard (translated to English):
http://www.marans.eu/loeuf.htm#loeuf
Level 4 - The extra red egg of MARANS but still insufficiently level, especially varieties NCC, ACS, BCC, BCA ... Note: the background color is not better than the egg # 3, but the amount of pigment is more important, its distribution has been uneven in spots, which provides a minimum factor and related to said extra red egg. genetic capacity A minimum brightness will always be the highlight. Experience: A minimum of 4 egg, when laid on a background of natural terracotta red, should come off in a tone a little darker on the bottom of the red shade "terracotta". Note : While it is generally and from the origins of the breed recognized that the level 4 is the bare minimum to allow the label "Marans" - this is especially true for some few and selected varieties - the minimum desired level is 5 6 or satin gloss, especially in the Black variety camail copper. Level 6 or 7 is perfectly compatible with the selection of an almost ideal phenotype described in the official standard of the breed. This is a sought after and recommended for all farmers by the MCF goal. A one-way selection and priority by the egg, makes selection difficult at the phenotype. The reverse is also true. There is nothing inconsistent in theory. 's egg laying insufficient color does not justify the label "Marans". Similarly, subjects ultra dark eggs 7, 8 or 9, but which type is far from breed standard are not more of Marans. True Marans is a standard racial respected TYPE + very dark EGG.
Levels 5-9 - extra reddish-brown egg pulling chocolate . Note the more rounded, globular, typical of the Marans egg, brightness is always an additional quality. Stem laying eggs 7, 8 and 9 have unfortunately often experienced a lack of selection in favor of the standard: light or narrow types squirrel tails, feathers and impure colors etc ... The selection requires a very important work and time-consuming in the Marans since it must reconcile as much a type and a specific standard and the requirement of a typical extra-red color of the race, if possible, the minimum level 5.
Levels 8 and 9 - Exceptional Eggs whose color is similar to the pure pigment. Admittedly, once again the most beautiful eggs are obtained at the beginning of spawning. It is normal pigments shells fade in full spawning, stabilizing at around 6 and 7 for the best. A good strain has a high proportion of eggs level 5-7 to maintain constant state by a careful selection year after year. The qualities of a laying should be assessed in the color eggs start laying eggs after the first 20 and the regularity of this color during most of the season.