According to this new study, eating breakfast and dinner more frequently with family members was unrelated to cognitive and behaviorial outcomes for kids from kindergarten to 8th grade. A parents-are-everything model would predict that family meals are important since it is a time when parents can encourage and instruct kids about school and behavior. (It is an opportunity for bonding as well. One of my fat friends associates food with his mom's love.)
My students absolutely refuse to believe that parenting has little effect on a child's IQ and personality. Citing research doesn't matter. The idea is repugnant to them. Americans hate genes.
For those of you who are more open: don't decide to not have kids because work takes up too much of your time. The truth is, you ain't that important. (Your genes are, on the other hand.)