So, first disclosure, what motivates me to get out of bed and get to the slopes is not laying down some sweet railroad tracks on snow glare hardpack. Just not me.
In my quiver, the skis that spend 90% of their time on my feet are a set of 2009 Kung Fujas (95 mm waist, first year of rocker tip and tail) and 2009 Obsethed (105 waist). They both have almost exactly the same charateristics (I got a really good deal on the Obsethed last season which justified the purchase).
I've never, ever had a problem skiing a wider ski in what passes for hardpack in Colorado, and both the Kung Fujas and Obsethed have far exceeded my expectations when it comes to hard-snow performance. I love these skis and find them extremely versatile.
They aren't carving skis, but they don't suck, either. They will lay down railroad tracks if you understand how to lay tracks. Will they do it on glare ice? Not for me, but I don't exactly buy skis to make me a hero blue ice skier.
For the few days a year where I know EVERYTHING will be rock hard, I'll ski a different ski. As I ski with a developing skier, I spend a fair bit of each day on groomers. So, I use these apparently terribly designed skis to ski all over the mountain, and they do well. Hmm. I bet there is a term to describe a ski that works well ALL over the MOUNTAIN. A pintail is not exactly an all mountain ski attribute, although I wouldn't rule out using an S7 for my ski days either.
Not everybody is looking for an ultimate slarve ski, and I find it kind of funny that a pintail performance in deep snow enters the conversation when the OP is talking about the hard snow performance of his Kung Fu's.