Yup. Both UPS and FedEx do the same thing for me on deliveries. It makes no difference what preference the sender paid for, they leave it on my stoop as a favor to me, which it is on delivery. It is no favor to the sender.
That's why I use USPS for the 8 zillion things I mail each month. If you send an item with Signature Confirmation through USPS, the carrier will obtain a signature or the item is going back to the PO awaiting a signature. If you get in any dispute, you have to prove that your recipient got the item and USPS Signature Confirmation will provide that.
PayPal disputes require direct online verifiable signature confirmation in all disputes over $250, and if you want to make sure you actually get that, you really have to ship USPS.
The problem with this particular deal is that it was a trade. I guess Signature Confirmation would have at least protected Greg against the "I didn't get it" lie, but really to enforce it, you have to go to court which generally costs as much as what you are protecting. I know you guys like to trade, maybe escrow is the way to go (never really thought it through, I don't trade cues). On straight purchases, I always pay via PayPal funded by my credit card, then in all unresolved disputes, I can always just make the costs go away.
Kevin