That's anecdotal evidence. It doesn't invalidate the fact that a large percentage of people do grow up to follow their parents' religion when it's taught to them as children. That's why you have such a high percentage of children who grow up to be Muslim in Muslim countries, and Christians in Christian countries, etc.
I was stating that my own experience shows otherwise and I am only going by people I've known personally. If I go by my own experiences with people I've known, then I can say that very many of my friends and peers left the religion they were raised with and some stayed with it. I live in the USA where there is a lot of diversity, as well.