Ok, i don't have kids. But, I am a child and I thought I'd share my family's situation.
I have 4 sisters. My oldest sister lived at home until about a month before she got married. She was 21 when she moved out. My second oldest sister graduated college last August and moved out within a month. She was 23. My third oldest sister is 21 and plans on living at home at least for another year. Probably a lot longer. She is considering getting her masters right after she graduates and if she does, will probably remain living at home. I am 19 and live at home as well. My current plan has be scheduled to move out when I get married. This will either be when I'm 20. Either the semester before I graduate or the semester after. We'll see. My youngest sister, she's only 10. Who knows what she'll end up doing.
The reason why none of us have moved out while in college is because none of us believe going in debt is the right thing to do. In order to move out, we'd have to go in debt. None of us can/could afford to go to school and pay rent, bills, etc. But, my parents aren't able to help out with school (although all of us are/were on HOPE scholarship, which pays for all tuition and some books), so they figure the best way they can help out is allow us to live at home rent free.
Also, Thrift Ray, my two sisters that don't live at home both live within two miles. The oldest lives in the same neighborhood as me and the other lives in an apartment complex just down the road. And, the funny thing is, my boyfriend just decided to move into the same apartment complex. So, we are all VERY close together. And, it seems like EVERYONE is still here at the house every single day.
