This is interesting to me. Yes, these are sales techniques and the primary benefactor is the restaurant because they make more profit. But if the diner felt more satisfied after eating the better described food, is it also providing a benefit to the diner by subconsciously helping them enjoy the meal more? (nb: I haven't looked at the study to see if the article is accurately representing what it said.)
(I can also say that the only time I have eaten at a restaurant with these kind of prices was in the late 90s when I was doing a website for one. They gave me free meals when I did the work on site, so I got to enjoy some expensive meals that were outside my budget. It was quite nice, but in the end I'm a $10 meal kind of person.)