Just curious from reading the boards. What I have seen of catering menus online, most of the heavy appetizers selections are pretty darn filling and served with food stations (as an appetizer selection) which is the equivalent of a full meal that is plated. As an example, I went to a wedding in Texas a couple years ago where they said heavy appetizers are the standby and guests were expecting afternoon tea, but there was so much food that people had to be rolled out to their cars.
Also, it's commonly mentioned that in the NYC area for a cocktail hour to be a variety of stations plus appetizers to the point where guests are so stuffed that the plated meal following goes untouched. No one ever talks about being starved as a guest in that situation and the food offerings are exactly the same, just a larger quantity of options but equally substantial. A heavy appetizer is akin to the eggrolls and spanakopita from the Costco frozen section (multiplied by 15-20 pieces per person over a 2-4 hour period) and not a cube of cheese and a cracker for the entire night.
My curiosity is why is it automatically assumed that heavy appetizers is not remotely filling and that you are being incredibly rude to your guests by 'not feeding them' when a caterer prepares more food for that than a plated or buffet meal serves?