Yes, additional forms apply to goods imported in excess of USD 2000 -- my shipment was also held for a while in Memphis customs.

The savvy but patient 36Gb customer might wish to put extras in a separate order, so the values of each shipment are below $2k, but I can't imagine that there are many queued with both of those qualities.

Cheers to customer support for bludgeoning Fedex with paperwork on my behalf. Thanks, guys.