Never tipped a UPS or Fedex driver and never even thought about doing that and I can't remember even one package that was damaged. Heck, most of the time no ones around when the package arrives anyway.
Order up more stuff from the East Coast. They have compaction methods
to squeeze more packages into an irregularly shaped air cargo container
with NO REGARD for your wares.
They also allow 70# packages to slide down LONG ramps and they BASH
into other packages, causing DAMAGE. THEN, when you call to collect
they put you thru a MASSIVE gauntlet of "RULES". One of the BIGGEST
BS rules is your item must be protected by 200# cardboard box and
be padded on all SIX SIDES w/ TWO INCHES of padding. If not they
will REFUSE a claim, and you did not even pack it! NOW, you go back
to the shipper and they say "Well, you didn't buy in surance so it
is not our problem" .