At one of the better restaurants I frequent, one of the veggie sides is three or four stalks of grilled asparagus. I do not regard this as an adequate serving of asparagus. The mashed potato serving is about half a cup, which is actually the recommended serving size of mashed potatoes. The lamb chops (oh, the lamb chops!) come in triplets, and each one is very thin, and there’s perhaps an ounce of meat on each chop, even if you pick them up and gnaw and suck each delectable morsel off the bone.
At lower end restaurants, well, the mashed potato portions might be a cup and a half (three servings) to about five or six cups (which is really more starch than I should eat for the entire DAY). It’s cheap for restaurants to put more food on the plate, and the diner thinks that he’s getting his money’s worth by looking at a plate that’s covered with food. The diner is concerned about getting a full belly more than savoring the food.
Higher end restaurants offer wonderful appetizers, desserts, and drinks, and they want their diners to have room to enjoy them. A group of people going to Denny’s might order an appetizer to share, but it’s more likely for each person to get one meal, and expect to eat everything on the plate, and expect to be completely filled up by that plateful (unless the diner is a teenage boy, those are impossible to fill up).
On the other hand, eating at a high end restaurant is partly about eating as fuel, but mostly about enjoying the experience. It’s not just the food that should be enjoyed, but every moment of being in the restaurant. There will always be some sort of centerpiece at a higher end restaurant. It might be flowers, it might be candles, but it’ll be there. A centerpiece doesn’t automatically qualify a restaurant for being higher end, though. Cracker Barrel has oil lamps on its tables. Also, a lower or middle end restaurant will have a clean, functional bathroom, possible with air freshener, but with minimal decoration, if any. One or more stalls or sinks might be out of order. The toilet paper and towels will be just barely adequate. In lower end restaurants, especially, the stalls might be out of toilet paper (and management requests that guests not throw paper towels into the toilet, which probably wouldn’t happen so often if the stalls were restocked more often). A high end restaurant bathroom will be pleasantly (but very subtly) scented, it will be tastefully decorated, everything will be in working condition, and there are usually some amenities in there. A diner never needs to notify someone in a high end restaurant that the ladies’ room needs to be restocked, because someone has checked the bathrooms recently, and has put in new supplies before it’s necessary.