Well, the teams above us in the rankings - and not the Cards (30) and Lions (27) - are the Bears (11), the Steelers (14), the Texans (15) and the Panthers (16).
Doesn't seem that unreasonable.
Steelers might be questionable after such a bad loss, but they often start the season slowly. I think arguments can be made for each of the other to still be above us, after close games against tough opponents.
Besides, it's a power ranking. It's all only based on opinion anyway. And it's only one game in the season, and we did do our best to lose a game in the first half.
I think it's a fair assessment.