[pinguinFromY]

Yes, they do, why not? If you are in a rush you have to grab something for a quick lunch, that's what sandwiches are for. Or maybe because they are cheap and people might want to save money. I'm like you, lunch is 1 hour fiesta where I just eat a hot meal and chat with whoever I'm taking lunch with. My American colleagues seem to like rushing lunch or "grab something quick" all the time.

[omnimus]

"Grab something quick" sounds like emergency not something you should do often.

I guess many people live in constant state of emergency.