Well on the Believer specifically that's what it was: a team driven powder freestyle board. The Grip was effectively Nyvelt's pro model and rode best in deep snow, it was the Sherlock before the Sherlock. The first terrain they mention in the 'Spoons description is pow. Did you just forget the Trick Pony in your "only true-twins that I would call really good in powder" list or was that on purpose? It is part of the Family Tree line. The others are definitely primarily all mountain boards.
Well, let me restate this slightly differently: While the Believer and the Grip floated almost as well as the Sherlock, their targeting was slightly different/more towards the all-mountain side.
In contrast, the Pillow is pretty much a one trick pony (sorry...) - better in pow than the other decks, but worse in anything else
I did not mention the Trick Pony because the jury is still out on it. It looks like a ton of fun and Burton calls it a "stepped up Sherlock" which sounds about right. But on the other hand the shops are told to market it as an all-mountain freestyle stick...
But like I said, there isn't much more you need to do to an all mountain board to make it a "pow" board other than marketing and rocker. There are some things here and there that make it track better but ultimately it's a twin and doing all that will only get you so far.
See, I do not fully agree with that. Here is my take:
There isn't much more you can
to do to an twin
board to make it a "pow" board.
other than marketing and rocker (which only get you so far) to be a pow board it needs a big and/or long nose, which generally screws it up for most twins.
The Pillow unlike all the other boards listed embraces this design trade-off: It is basically a Skate Banana with a long nose and a long tail. I understand that the resulting ride is pretty much as one would expect it to be - great in pow, but much more compromised in anything else compared to the other boards listed.
The other factor in the Pillows low interest is Mervins marketing in general. Look at the boards that sell well. It's the boards they hype the most. That's what drives Mervin sales more than anything. I saw almost no drive on their part for the Dirty Pillow after its initial release. No one wants one cause Mervins isn't telling you that you want it.
And there is that, too.