Well K2 has been stressing that the Ultra is not a powder board, but a BC board. In the back country you don't just get powder, you get crud too. So its designed to be fantastic in powder, but will get you through the crud in between just as well.
Go ahead, drink that kool-aid.
FS: Forum Sauce 142 $200 plus shipping
FS: Flux SE30 $75 plus shipping