This makes a lot more sense if you're right about the numbers. It's not the single meal they are targeting but 2-4 meals. That will drive down the number of meals they have to deliver to make a profit. If the meals are of superb quality this idea works. But it might be tough if they are delivering: food doesn't travel well -- your food is guaranteed to be sitting for 5-15 minutes.
Key Munchery operational detail: the food does not travel hot. It arrives refrigerated, with detailed reheating options. Wouldn't be surprised if it is flash-chilled after cooking (otherwise how do they get my steak right every time :))
I think they are targeting dinner for families. I always order 2 meals since they don't deliver lunch. You have to order food before 10am and they deliver b/w 3-6. My food is definitely sitting at least 1-2 hours because it is being delivered from SF to Mt view. I believe they have proper storage in the delivery vans - I don't know the details though.