Here in Boulder CO it seems like a temporary 'getting on your feet' type of move. Many of the listings I see for shared living are along the lines of "I just moved to Colorado and need a shared living situation while I get on my feet and find a 'permanent' living situation." Rentals are highly competitive in this area so it makes sense because many leases are filled very quickly - already living in the area helps when you're trying to find your ideal living situation.