I've heard claims of super calicos/sugars, even seen pictures of some supposed supers and seen them pop up for sale on kingsnake and morphmarket, so some people are of the mind that it is co-dominant and has a proven super. I don't believe there's definitive proof as all super calicoes ive heard of or seen haven't been bred to prove the super (or the breeding trials haven't been released). It's a debate as the supposed super looks like an extreme high white regular calico, a look that can be present even with only one copy of the trait, so breeding trials are really the only definitive way of proving out, and even then it takes multiple clutches.