Speaking as a former UPS employee, I've seen monitors, computers, lots of shipments from Newegg, etc., get tossed up to 10 feet onto metal chutes and into a bin. The way UPS deals with oversize or overweight items is to toss them down a chute and through a separate sorting process. So if you order big monitors, order large quantities of anything, etc., it's very likely that if it was dropped, kicked, thrown, or otherwise battered during the shipping process. Freight, however, is a different story. Speaking as a former freight driver and dock worker for almost every major freight company, your shipments are significantly more likely to arrive undamaged.
I've had a laptop delivered by DHL from Sony after a repair. The box looked like it had been attacked by a bear. Even the plasticy DHL envelope thing was all ripped. Needless to say there was a huge crack in the screen and it wouldn't boot, had to send it back again. Not sure what the caretaker was thinking when he signed for the box.
