i think depending on where/what your doing either can be better, going faster on piste with big carves or annoying long flats boards cant really compete, its hard to look cool scooting along a flat while skiers glide by with ease. in deep powder boards are better, hands down! i agree they may not be ideal and a bit harder on the way up if your hiking but coming down kicking up a huge powder spray is unbeatable.
in regards to grumpy and the "i have a burton vapour so i am cool" argument, all that proves is you have more money than sense as there are better boards out there for less,
Having a Vapor is like having a Stella.... It's reassuringly expensive. Let's poor people know you're better than them because you have more money than them.
Poor people disgust me, especially when I have to stand next to them on the Furnicular