I'v lived in northern Ohio all my life and never noticed the ware your talking about.
I suppose it depends on which side of the crown you like to ride on.
I use both sides of my lane depending on traffic .
But I do ride more on the left side of my lane to keep away from the DEEP ditches we have up here.
That would ware the right side of the tire more. But again, I haven't noticed it.
I'll keep an eye on it since my tires are newer.
One note:: The new Stones have a little over 2,000 miles and are starting to show the wavy pattern on each side just off center.