Maybe I got a bacd example, maybe it's because it's in a smaller bedroom.  Regardless, I've had this rug for almost one month, and the smell is overpowering.  I've had an exhaust fan running 12 hours a day in the dead of winter and vacuumed it almost every day, and the smell doesn't seem to abate at all.  I'm not terribly sensitive when it comes to odors like this, so for this exceed my threshold of tolerance is saying something.