1. The delivery guys are taking 2 or 3 deliveries at the same time. If they aren't, that's because the restaurant is slow. Why would the restaurant be slow? Crappy pizza. Order from somewhere with good pizza.
2. "Cover the cost of gas" - I have a hard time believing that even at $3 per gallon, that the cost per delivery is even $1.
3. I had the sweetest deal: $10 per hour, company car, company paid for gas, etc., + tips. Regardless, I still hated taking deliveries. But the company's insurance wouldn't allow drivers under 25, so depending on the crew I was with, occasionally I had no choice.
4. If you were known as a good tipper, you got your pizza a whole heck of a lot quicker. Since 95% of our pizza sold was cheese and pepperoni, we were constantly cooking pizza that wasn't ordered yet. It wasn't uncommon for our good customers to get their pizza within 2 or 3 minutes; depending on the driving time.