I don't think she is. Like you said, she was handed it, and takes the job lightly.
Plus she was so goshdarn easy! I beat her in one try. The E4 was honestly tougher. In HG and FR I beat Lance by like 5 HP. But only one of my pokemon got KO'd by Iris. It's pathetic, that's what it is. Though Alder was pretty easy to. But Iris was the worst.