out of all the skis i've owned over the past 5 seasons (Mantra, Karma, No Ka Oi, King Salmon, Lib Tech NAS Freeride, Titan 9) the only one i can say wholeheartedly was a serious crud basher was the Mantra. that thing absolutely killed it in chopped up, manky snow.
that said, i have to agree with Mr. Peters, in that it's largely about technique. if your'e really a strong, proficient skier, then you can ski all conditions on any kind of plank (i have witnessed this time and time again, most recently this past spring at Sugarbowl when taking a free lesson and the instructor absolutely killed everything that was thrown our way on the mountain and he was on some skinny-ass Rossi race skis).
at any rate, i had been repeatedly told much of what Bob mentioned--about driving through the crud and that heel pressure and any kind of backseat action will foul you up. that's the truth. i found this past spring that if i drove the tips and really aggressively attacked the crud, it greatly improved my chances of "floating" or at least breaking through the crud. what's more is that by attacking it didn't matter that the ski i was on was slightly noodled (i did most of my 2008/2009 crud skiing on a pair of severely used Lib Techs). granted, a stiffer tip would have helped, but employing even the crudest attempts of the techniques that Bob revealed totally improved my crud busting ability.
so, i'll have to agree that it's largely your skill and the skis only accentuate (or deter) from that.