Means nothing. Any team wants to give a rookie QB some time to develop even if it's a few games his rookie year before they throw him to the wolves. Say what you want about Moore and Garrard but they are good enough to warrant letting them lose for a few weeks until they believe Tannenhill is ready.
Supercollecting Josh Johnson (University of San Diego, Tampa Bay Buccaneers, Cincinnati Bengals, San Francisco 49ers)
Collecting Philip Rivers, Padres, Packers, Lakers, University of San Diego alumni
My Bucket, always selling and trading: http://s1204.photobucket.com/user/kramerattack/library/