haha seriously... a dollar for pizza delivery? I tip basically 3 dollars + the change when i get anything delivered.
Though places the have a delivery charge and specifically say its not part of the tip really bug me. I'm not going to pay 2 bucks charge + 3 dollars tip... I'll go somewhere else or just pick up the food.
Back in 1990, the chinese place I worked for was next to Dominoes. Our orders would roughly be the same (about $20 in chinese food or $20 in pizza for the average order, with the pizza being slightly below $20 and the chinese slightly above).
The pizza guys took about 2-3x the deliveries and only got rounded up changed ($19.25 would get them $20, $20.75 would get them $21). People said "it's just pizza".
Meanwhile we averaged $2/order. We'd cash out like $100 in tips many nights and start later and get off earlier, many pizza guys got $50 at best and worked past midnight.
I usually give about $10 for 4 pizzas....they fight to get that delivery. I spoke to a few of the guys and it's the same way today...a lot of people think 'it's only pizza' and just give a buck at best plus everyone wants to yell at the driver about the delivery charge.