Oscar Mayer Memer
I think that's more "leave for the day"...if you plan it out correctly, I can see the advantage in that. I don't think it's ever "I'm so hungry...we have to leave"
There are a lot of variables at play here. Sometimes I'll be OK with QS or a snack in the parks, and other times I'll leave to eat and then go to another park. That's mostly UO -> Disney or Disney -> UO though. If it's close to the time to leave, maybe a snack in the park and then something along the route home.
Definitely agree that it's never "I'm so hungry...we have to leave" though.
If you don't have a reservation and you're starving, you're probably going to have a snack in the park, settle for QS, or hop to a resort with TS availability anyway so leaving to eat isn't that much different really.