Eh, it's a fine theory but I have twins. One is the pickiest eater ever and getting her to eat is like an on-call sort of situation to be handled personally by mom or me. Her twin sister, these are 4 year olds, ate like 8 pieces of plain, steamed broccoli with her dinner last night. Her 2 year old brother is a great eater, too. The only difference (in routine and exposure to others) between the twin girls is that they're in different preschool classrooms. I've long suspected that she gets a lot of this behavior from other kids in her class.