I don't know about how much eating at home has changed, but I think people today would be shocked at how small a restaurant meal was in 1990. Back then the large, upscaled items would be the "small" of today.
absolutely. When my family goes out to eat, we usually only order 1 meal and split it between the 3 of us, the meals are that HUGE. half the family don't get what they want, but it is cost effective.