That makes sense. It doesn't seem to me that I've ever seen a pure straight white stripe. I haven't tried to track the depth of stripe color with cream vs gold. But maybe will give it a shot if I get a lot of females from the hatch a few weeks away.I don't feel that the stripe color indicates gold or silver.
I think we have mostly determined that we DO have a Cream Legbar-type bird in the US even if the coloring is a bit off still. ALL chickens are either gold based or silver based with other genes on top of that giving them their unique coloring. Cream Legbars are gold based. Double dose of the recessive "cream" gene dilutes the gold to the color we are aiming for. The red modifiers/autosomal red are a different beast entirely.