My understanding is that they've set some limitations, but it's still possible. I think you have to have gotten your first dan (so if your instructor did one those shady things mentioned and you never even got a real KKW 1st dan, you're SOL), and there's a limit to how many dan grades you can skip. You have to have enough time in grade to have done the proper way, too, so you can't use skip dan testing to rank up faster. The person promoting you needs to write to KKW some document explaining to them your circumstances, training history, and why they think you deserve the skip dan, and then KKW will decide if that's a good enough reason or not.