I rented a Pugsley one week end and took both bikes out to compare side by side. I wound up buying studded tires. The bottom of the trails has been ice and up high to loose snow to float a fat bike. A standard bike has worked most of the time.
I'm inclined to agree, though I don't have much experience riding in the white stuff. I've ridden the trails in November and December when they're only lightly dusted with snow and been surprised at how well my hardtail handles.
My former neighbors, who were from Alaska, liked to take their wornout tires from seasons past and drive screws into them so that the threads were coming out of the treads. Then they would ride their bikes over snow and ice without much problem. Keep in mind these were ordinary trail tires in the neighborhood of 2 inches wide.
I'm sure they would get stuck/bogged down in deep snow, but it seemed like a cheap, effective solution, otherwise.
Nice ride, All_talk. Surprising that the trails in Washington are that dry/uncovered.