Could be. I read an article a while back on trying to eliminate darting and that was one thing that the article stated that would help. I tried it, and it did seem to work. If the high side was supposed to be in the back and it was reversed, i would imagine that the front of the ski would be forced into the snow, which would cause harder steering.. makes sense to me.
This wasn't the article, but close...
Darting Solutions - Bergstrom Skegs, Inc.