Here's my .02 (this, after skimming through four pages of posts in about 5 minutes of speed reading):
I have to agree that the bindings make a huge difference in weight. However, since the OP was talking about ski weight that's what I'll focus on. Besides, I don't know s*%t about bindings.
I'm pretty light, about 5-10 and 140 lbs. I love my K2 Outlaws because they are heavy, they are damp and stable, no chatter on hardpack, they crush the crud, but because they are soft they can go through deep stuff pretty well for a 92mm wide ski. They hold an edge and absolutely rail the arcing turns. They like to go fast, that's one area where the weight is a big, stable advantage.
I also picked a pair of Stokli Spirit SC, about the same weight, but a totally different, 65mm wide carving ski. It skis very "light", it's quick and responsive and rocks the bumps (though not what they're made for).
So here's an over-simplified equation:
Heavy ski + light skier = firm contact with the snow.
I also want a pair of lighter skis. Ergo, light ski + light skier = quicker turns, better in moguls. Maybe better flotation in deep snow, given similar dimensions and running surface.
Light skis are good, and so are heavy skis. Different day, different conditions.
I question the OP's claim (a few pages back) that most skis (other than Goode) are heavy. I demoed a bunch of skis in the past month or two For example the Fischer Watea 98 (and the 2013 version, Big Stix 98) is very light, very quick, awesome in the moguls. The Salomon Shogun also was a nice weight, not super light but definitely not burly.