Large party of about 20 guests. I started taking orders at one end of the table and worked my way to the other end. By the time I finished getting all of the orders from this party (about 4 or 5 minutes, they were all somewhat indecisive) the first lady called me over and asked me how much longer the food would be. When I explained that I had only just finished taking her group’s order and would ring it in immediately so it would be about 15 minutes from that moment. She huffed at me and muttered “I knew we should have gone somewhere else.”
as if to ask, “What you mean you guys don’t send the orders to the kitchen telepathically so the Chefs start it the moment she finished ordering? SHOCKING!”
-Joe
Break Room Stories 
She mean’t you were supposed to know telepathically what the people wanted to have before they even consciously knew or entered the restaurant. Also, 15 minutes is about half of how long most people would expect to wait. I’m surprised you didn’t turn her out of the restaurant, on behalf of everyone else, for her being outrageously grumpy.