A troubling trend is discussed in this New York Times article (registration required): “between 1970 and 2000, the most recent census, the percentage of 24- to 34-year-olds living with parents or grandparents increased by 50 percent.”
The article leads with a focus on a 30-year-old appellate court lawyer in Brooklyn, who “lives with his parents in Queens. His mother packs lunch for him a few times a week. His bedroom still has his high school baseball trophies and a giant stuffed bunny that was a present from a former girlfriend. On weekends, he plays touch football and goes drinking and clubbing with his two best friends ? both about his age, fully employed and living with their parents, too.”