[greedo]

Part of it (ironically I know) is quality. McDonalds is really obsessive about french fry quality, and their fries suffer dramatically after about 7 minutes. By the time they would get to your house/apt, they'd be dead. Pizza and chinese food is much more resilient.

In high school, the McD I worked at sold food to one of the local school cafeterias, so we had to cook over 200 burgers and fries all at once. By the time we were done, the oldest burgers were about 5 minutes old, same with the fries. After delivery, the food was a good 30 minutes old. Made me shudder, but the stuff was insanely popular at the school. I guess the cafeteria couldn't cook their way out of a paper bag.