this is my experience from working in many restaurants (not as a cook) along with being a foodie. While food tastes differ and is subjective, all you'd have to do is compare the best restaurants menu with a food buffet.
Beyond that.... as a former back of the house restaurant employee (10+ years, Cordon Bleu, blah blah) I can tell you that the only time fewer dishes is a guarantee of higher quality is when the staff isn't skilled.
http://www.huffingtonpost.com/2012/04/30/worlds-50-best-rest...