Thoughts on this year's AIME I difficulty

I'm the AMC coordinator at my high school, and this year's AIME scores, according to the official report, are by far the highest that I've ever seen here. We have a 13, two 12s, and a 9, among a lot of other scores. Our top scorer came out of nowhere, isn't on the math team, and isn't the top student in her grade. Was the AIME very easy, or should I suspect cheating? What did you think?