Opinions on sharing a room

My cousins have twin sons (fraternal) who went off to college last September. The boys were bio, not adopted, but one twin was born with a heart problem and had to be in the hospital for quite a while as a newborn. They're both fine now -- taller than their parents, healthy, bright, and delightful human beings. The family is affluent, and their home has plenty of bedrooms. Still, the boys always wanted to sleep in the same room. Interestingly, one was very social and one was more quiet, but they weren't bothered by each other's phone calls, texting, and Facebook chats at all hours. One year, they decided that they were going to have their own rooms -- but when it was actually time for the move, it didn't happen. Interestingly, the boys have gone off to two different, but excellent colleges, in different parts of the U.S. I can't wait to hear how the past year has gone, for these two amazingly close brothers. Sharon