They are carving skis and definitely do great on firm, even somewhat icy slopes. Edges easy to find, they do carve like they want to turn themselves. More than one comment here from east coast skiers that they do well there. However, I have used them for 2 winters in the Wasatch (almost all the SLC resorts) and Rockies (I-70 corridor places up to Big Sky) and they have been great *for me*. I'd be the first to admit I don't know HOW to ski powder well, but I was on them for singularly the most magical two runs of my last two years: snowing and cold at Copper Mountain in February, late afternoon on West Ten Mile, a really easy green that's on the very edge of the resort, separated from everything else, a lovely groomer that meanders through the trees. I was the only one on the run, the untouched fresh snow was a few inches deep, over my boots but not deeper. The skis had tips wide enough to keep me from burrowing in, and... I *floated* down the entire run. Twice (before the lifts closed). Arms spread wide open, grinning behind my mask like an idiot. Magical.
oh, sorry, where was I? :P
They also have done great on a blizzard day at Deer Valley, again on green and blue groomers in a few inches of actively falling powder, but again I'm not an aggressive skier. Dang, though, it was fun.
As for West coast conditions, do you mean heavy, wet snow? (lol, I grew up skiing in CA, I say that with love.) Spring conditions here in SLC have been viscous the last couple of weeks but with a shift of weight rearward and an effort to NOT edge too hard I've been impressed that I can makie them float on top and skim over mashed potatoes pretty well - haven't caught a tail yet. Pretty good for a 79 waisted ski, I think!
That's me - I just purchased my new ones so really really WANT to continue to love them.

They seem to do a pretty good job of different conditions, even with a less than experienced operator.