I think living in dorms CAN be a way for some students to gain more independence, but it is definitely not for everyone. Cost should definitely be a factor in making this decision. For me, living on campus was actually not *much* more expensive than living at home - my financial aid from school gave me a grant, which paid for a good portion of the room/board costs. My senior year, when I decided to commute, the grant was reduced, as the expense was not there.
There are good things about living in the dorms - it can be an easier way to meet people and make friends, you are closer to all the campus activities all the time, it can be a sense of community within a floor/dorm building, there are no parents/adults watching over you 24/7, so you must learn to be independent with your work, going to classes, etc.
But your student may also have the experience of "party buildings" - obnoxious, immature dorm-mates or even roommates who are up until 3am, drinking, dancing etc. Your student's dorm may not have that tight-knit community feel; many of the students may travel home on the weekends; your student may feel trapped or stuck at school and not excel. Sure, living with another person (or 2 or 3) provides real-life experience in problem-solving and learning to deal with differences... sometimes those can interfere with your student's life and well-being.
I don't think it's right to generalize about dorm-living. For some, it may provide a chance to learn to live independently, and for others, it may be a free-for-all no parents party for 16 weeks at a time. It largely depends on the type of person the student is. While some may be mature enough to understand that they are there for academic purposes, with all the added benefits of dorm life; others may not care that they(student loans) or their parents (footing the bill, taking loans etc) are shelling out thousands of dollars a year.. that type of student certainly does not benefit from dorm life in the manner that some are proclaiming.
In my personal experience - I lived on campus for 3 years, at a very small school. There was lots of drama, not always a lot to do on weekends besides go home/work, or go out to a party, and I eventually decided to go home and commute for my senior year. Things I learned from living with others in the dorms: roommates can be crazy, girls have even more drama than I thought, 18-21 year olds are incredibly immature, and I became proficient at doing my own laundry in a community-setting...
Things I learned commuting from home for one year: how to manage my schedule, what to do with down-time between classes without a room to go nap in, managing time / driving and traffic from home to school, managing money (no "meal plan"), coordinating group projects when living 20+ minutes from other students, focusing more on school work with less distractions at home, being able to work more hours at part time job.
Just my 2 cents
