Final answer:
One set of salt and pepper shakers per four to six persons at a dinner event is indeed the typical standard and ensures guest convenience.
Step-by-step explanation:
The statement that salt and pepper shakers should be preset according to the number of guests at each table is true. Typically, one set per four to six persons is suitable depending on the menu. This ensures convenience for guests and efficient service during a meal. Planning for the appropriate number of condiment sets is part of the larger task of setting up for a dinner party or event, much like the organizing of seating and the distribution of food. The preparation for supper as described in the reference involves a transformation of space and the arrangement of various elements, including table settings, that contribute to the dining experience.