Frankly, this whole topic is somewhat hilarious. The owner's manual has a tire rotation diagram. At my dealer's "customer appreciation night" I attended the service manager and Crossfire tech there were adamant that the tires were unidirectional and not to be rotated. They both had puzzled looks on their faces when I mentioned a tire rotation diagram in the OM. I shrugged it off.

Essentially, it appears to me that no one really knows. I've chosen not to rotate and let the chips fall.