"Dry" means that there was not enough epoxy to fully fill the interstices (spaces between fibers) of the fiberglas / carbon cloth. In effect, this means there is inadequate bonding between the fibers, because there is no epoxy between some of the fibers - nothing to bond them together. It is sloppy build, skimping on epoxy by not fully "wetting" the cloth (i.e., saturating it with epoxy before slapping it together in the mold). There are other lay-up flaws that I won't elaborate on here, but that is the meaning of "dry".
I'll agree with Caleb that the K 11'5 is a windsurfing board. It'll show you some glide in waves with light wind, fun for that, but when the wind picks up it'll go. Longboard style of "go" - kind of bounding over waves and swell - but it'll go, planing into and out of jibes. Of course in flat water it likes broad drawn out affairs (long outline, overhanging duck tail). In waves / swells, it'll slash and carve pretty neatly - not like an 85L FSW, but better than you'd think. Real fun.
I've sailed SUP's that I thought were going to break in half once I got them planing, feeling all the board flex. You can feel the K 11'5 flex, but it's a solid board.
I have little doubt that a good surfer / SUP'er could show us a thing or two on the K 11'5. If Robby could loop an Equipe, Kelly Slater could barrel roll a K 11'5, I've no doubt. But I agree with Caleb, if you're not quite that good, and SUP is your main mode, I probably would test ride the K 11'5 but it's probably not your thing. If you want to surf sail (gliding), plane in the surf, and maybe do a little paddling on complete no-wind days...and do all of that with just one board, the K 11'5 would be a compelling choice.