It is a matter of time. When they look like they are really not going to contend this season for a post season spot or if Warner really stinks it up again with losing the football.
I have been a Warner fan since his breakout season in 1999. It is too bad he keeps landing on teams to be a caretaker for a high draft choice at QB. With that, it is quite obvious his better days are well behind him as being a very productive winning QB.
Leinart will do a decent job IMO when he get's his turn, but he will have the usual rookie rough ride, especialy in this pass heavy offense that also can't protect that well. Leinart though has great weapons at his disposal to make his transition into the pro game a good one. He will be a very solid player for years to come. He is a natural leader and an accurate passer. he also has some sneaky mobility as he showed in his limited pre-season.