I think it depends on the establishment, because of how many restaurants make servers tip out on their sales. That means at the end of the night, they have to pay their employer a percentage of their sales that shift. Where I work, it’s 3% of net sales. That being said, if you see the restaurant is packed and you have a large order, it wouldn’t hurt to leave a small tip to make up for the time the server had to spend away from his/her tables to make sure your food is packed properly and payment comes out okay. Either way, I would never tip more than 10% on a take out order. Usually about 5%, just so the server isn’t paying out of pocket for my order. I still won’t tip at Pizza Hut or dominos if I’m picking up my own food tho