Sounds like these were too soft for you. Too much grip and too little glide suggests you were dragging the pattern in the snow. Try a stiffer ski or a higher end crown ski (RCR crown for instance). The higher end waxless skis have shorter pattern zones which means if the ski is a bit soft the front and back parts of the pattern are less likely to be dragging in the snow (vs a middle of the range ski).
I think lower/mid range waxless skis are the hardest to fit because of the above. You can run into the same problem with skin skis - not sure about salomon but atomic lets you change the length of the skin which can help.
To this day I really can't tell much difference between the speed of all my skis - including my waxless ones - and that is with occasionally doing glide tests downhill.
Thanks Bart, yes I was wondering about trying a stiffer version of the crown ski. Carbon also tried the ones I had, so they would be "too stiff" for her weight, and she still had the same complaint as I did. Like you said, maybe a higher performance crown ski.
I've got Superlight Crown Shortcut racing skis - not sure if they're the same. They say "Carbon Powered" on them, which may be a sign. :)
It sounds like my skis are the right stiffness for me since they don't feel annoyingly slow. The difference in speed compared to waxable skis depends on snow conditions too.
Yes, you can change the length of the Salomon skins as well. And there are also different types of skins, but I can't recall what they are. The Salomon Equipe RC Skin skied very, very nicely. Similar to my current S-Lab (waxable). It felt smooth and fast. I bet with the right stiffness they will do the trick. I had trouble getting the grip to work well, but the ski was quite stiff and above my weight rating.