Actually, the average age for class of 2006 at Emory was around 30. It doesn't seem very common for them to admit students straight out of undergraduate school. It seems to me that they prefer slightly older students perhaps for their maturity, life experience, judgement, etc. And NO, I would never, ever, ever even entertain the slightest, most remote, possibliity of moving back in with my parents - but that's just me.