Class and Level Geekery VIII (spoilers ahoy!)

[Lothston]

He never says that Roy's sister was as powerful as Roy. Just that she could cast feather fall - implying that if Roy was able to do it, he wouldn't be dead, himself. That's no measure of power. A third level wizard would most likely be dead after a meteor swarm.

Truth be told, a well-played third level wizard would be more powerful than a badly played 15th level fighter.