I'm looking around their site right now, and I don't see any pics of copper foil on the pickups.
I don't think you have anything to worry about. I'm sure they used a more expensive way to shield the pickup....copper foil is like the least expensive way to do so.
Take the MM-style Alnico pickup I got from Carvin. I was surprised to see no foil tape, but it's just such a well made pickup, they used a different approach:
compared to a cheaper MM style Alnico pickup I got on ebay:
