For those who tip pizza delivery people, do you give a flat rate or percentage of the bill? Because I just ordered pizza and it occurred to me that delivering one or three pizzas is pretty much the same work.
I usually go flat amount - always at least $5, since I know that none of the places in town cover gas, and most make them pay for their own insurance. If it is a super darn busy day, or a holiday, I'll usually throw in a bit more. (Also, if it is an unusually large order.) - Jennifer Dittrich
Percentage, same as a restaurant. - Soup in a TARDIS
A waiter at a high-end restaurant doesn't do more work than a waiter at a low-end restaurant (and maybe does less), but gets paid a lot more in tips regardless. The system isn't necessarily fair but it is what it is. - Stephen Mack