Riffer, my experience is quite similar to yours. Postal shipments seem to get through with fewer fees and hassles, sometimes none at all. Ground courier shipments (I have only used FedEx) get delayed and dinged.
Courier shipments by air seem to be fastest and most fee-free of all. However they are also the most expensive.
Courier shipments by air seem to be fastest and most fee-free of all. However they are also the most expensive.