Funny you should ask, last week we had to replace our 30 year old refrigerator. Bought a new one at Sears on Monday, it was delivered Wednesday. We paid a $45 delivery fee so I was already leaning towards NOT tipping the guys, plus we paid a $10 fee to remove the old refrigerator as well.
When they came they tried to tell us it would be another $15 to change the position of the door handle so it would open the opposite way, um...no...right on the orders it said "change position of door handle", and I had to show it to them before they would agree to do it without charging us more $$. Then they didn't want to hook up the ice maker, and we had been told when we bought it that they would hook it up. The guy broke a part off the old one, so it couldn't be hooked up and DH had to go buy new parts to be able to hook it up himself! So, no, we did NOT tip them. In fact, DH called and spoke to the guy who sold us the refrigerator and told him about all the things they did. Not very happy with their "delivery service."