re: American Horror Story; S3. E2 "Boy Parts"

I just finished watching the first episode. I thought it was ok, and I feel that the season has potential to get better.

But should the 4 girls be considered witches? They seem to me to be more like mutants with a superpower or something. They weren't chanting spells or conjuring up potions in order to do their tricks. They just did them naturally like a superpower. Now the headmistress was conjuring up potions, as did the voodoo lady. But I'd consider the girls as having a superpower, and not really witches.