I'm not seeing it. Having hatched several Pewter Pieds and seen other Pewter Pied, Cinny Pied, and Black Pastel Pieds, I wholeheartedly disagree. The Cinny/BP gene affects Pieds in a way that Spider does. It seems the majority of pattern mutations cause mostly white Pieds with the exception of Enchi. There have been more than enough produced over the last few years and with the Panda Pied being another mostly white snake, I just don't believe that is what we are seeing here. Look a my pictures above. Here are some of the Pewter Pieds I've produced.
2012
2010 male. One of two pretty much identical.
2010 female. I think this one is actually a Sterling Pied going by the head color at hatching.
Hatchling pic from 2010.
Another pic of the two from above together. Super Pewter 50% het Pied and Silver Bullet 50% het Pied.
I'm not trying to hijack the thread....just trying to shed light on what is happening. Whatever they turn out to be, they are killer looking snakes!
Something else to take not of is the emergence of random black dot over time. These animals hatch out completely white with the exception of the head and the black dots began at about 600-1000 grams.