I sent it back for exchange, took it to UPS on the Tuesday before thanksgiving. I have been tracking it. It didn't leave my City though until the next Monday. It arrived in New York Wednesday and twice it has been stuck on a truck. It looks like B&H will receive it on Monday. Hopefully I will have another copy by the end of next week.
That copy was prime sharp at 24-50mm. It fell off from 50mm and was its softest at 70mm like others have reported on some copies. In itself that wasn't bad but it had a AF issue where it was back focusing at 50mm and not at other distances, that was bad. I think it will be an excellent lens if a person can get a good copy.