I agree, they often look pretty sporty when they're crossed with non crested varieties.All crossed with my Arkansas Blue rooster:
Arkansas Blue
Silveruud (light green egg x Blue = aqua eggs?)
Plus a couple polish (couldn't resist, offspring will be just nutty)
Olive egger (offspring should have "spearmint" green eggs)
Perhaps they're using "heritage breeds" and it was lost in translation or someone in sales thought it just sounded good. 