After some searching, I wasn't able to find anything on whether Avons are directional or not (since they don't look it from the tread pattern), so I contacted the dealer and thought I would share the results. While they aren't exactly directional per se, they do have a mounting specification.
While it's not really important for street use, I understand it has to do with the overlap of the tread splice and opposite forces of braking in the front vs acceleration in the rear. Would have been smarter if I figured this out before I had the tires mounted and painted AVON on them.
Anyway, below are the mounting instructions:
__________________
“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.”
www.partskeeper.com
(Less time searching, more time wrenching & driving)