Restaurant deliver can be worse when the driver is overloaded and your food sits at the restaurant waiting for them to pick it up, or when the driver picks up multiple orders at once (likely) and yours is delayed or is last to be dropped off.
I've definitely had this happen on occasion. There might be interesting ways to solve this problem, like showing the level of "delivery risk" associated with an order given the user's distance from the restaurant and time of day.
