I am relatively new to being a dog person, yet in my years as a member of a Schnauzer club (treasurer and board member, actually) and my years running this forum I have never heard the term supercoat before.
This is likely an indication of my ignorance and nothing more. Still, before buying such a dog, I would certainly want a thorough explanation from the breeder as to how this condition came about. Were other breeds bred into the equation? And how long ago?
When I Googled the term I found an explanation on a Toy Schnauzer site. This is all getting further and further away from the standard for Minis. It also had pictures showing a very different coat, not just a softer one as Kelly indicates.
That's not necessarily a bad thing! All new breeds and variations have to begin somewhere. But it's unusual, and I think it's important to fully understand it.
That said, I will address dogs that don't fit the AMSC standard:
When you are around breeders that have the AMSC standard as their goal, they can be a little bit "stuffy" about it. Though I've never heard them say anything negative about non-standard dogs, and quite the opposite. Some of them have marveled at how cute Partis and Whites are. It's just not their thing.
Their "thing" is concentrating on breeding dogs that meet the AMSC standards as closely as possible, and have as perfect health as they can genetically breed. When a breeder is emphasizing a change in appearance, you have to be sure that they are not de-emphasizing health.
I happen to love Partis and Whites, but I have to agree with Traci's point... if there are more and more and more variations of what a Schnauzer looks like, at some point Schnauzers won't look like... well, Schnauzers!
Then again, I own two color variations myself. So who am I to say there shouldn't be more!
Speaking of distinguishing points...
Kelly, I just noticed that Jedi's belly cut is a little bit like a Scotty's, though he has the long legs of a Schnauzer:My Black Miniature Schnauzer Is NOT a Scotty!
Course either way he's cute as a button!