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Using inside info, iPhone thieves arrive at your house right after FedEx
(arstechnica.com)
This is a most excellent place for technology news and articles.
It used to be that they would not leave packages unattended at a residence, they would leave a note on the door about an attempted delivery. I suppose with the rise of online shopping things had to change. I don't see American delivery companies bothering with trying to contact you/retrying deliveries, they just want to get out as many packages as possible... and there is a LOT they have to deliver in a day.
You do have a lot of choices in how you want your items delivered depending on the delivery company. Most of the have apps/websites where you can choose to have them hold the package, or deliver it to a specific location on property. By default packages will be left at the door.
Personally I have never had a problem with porch pirates, and if a package is expensive or important I will have the delivery company hold it and pick it up there.