TJ, having worked in positions that rely on tips in the past, i am a notoriously generous tipper, so don't go by *amounts* that i post, but base it on the situation.
IMO, tip amounts should vary based on where your home/apartment is located..... i don't think delivery/installation people are paid by the hour, but by the delivery.
If you live in a house with a nice driveway that is right next to your front door (or a laundry area that is very accessible), i would say that a $5-10 per person tip would suffice.
I personally live on a hill (called affectionately *THE HILL FROM HELL*)

Delivery people that end up here are in tears before they knock on the door for the first time.
for starters, they have to come up 6 steps with (and narrow ones) they next walk up a 40 foot hill that is squishy from tunneling vols. the corner at my side door makes it impossible for a turn of any large or medium sized item, so they need to proceed around the front of the house while navigating around a sunken trench, a well, and a trampoline...... then they finally have a straight shot into the front door
Last spring i completely remodeled my upstairs. All new appliances delivered at one time (including 2 stoves, 2 fridges, and a dishwasher, and a washing machine, new carpeting installed in the upstairs, and all new living room furniture and bunk beds for 2 kids rooms that were set up.)
for the appliance delivery, i tipped the guys $100 each (2 of them) furniture guys $100 each (again 2 of them) and carpeting guys, since the acted like dicks and were whiney about the placement of delivery $20 each only!!! the other four guys wanted to cry when they knew how much work they were gonna have to do, but remained professional and pleasant thru it all.... IMO that is SERVICE and deserves a well deserved tip for the extra work they had to do. ahhhhhhh....to only live in a normal house someday
