How long before Russell is no longer the QB of the future?

Going out on a limb here and foreseeing the Raiders QB trio to start the season as Russell, Tuiasosopo, and Walter. All three have held the moniker as the Raiders Quarterback of the Future, but it's now JaMarcus Russell's moniker to lose or succeed at. So how long before Raider Nation starts calling for his head? How much time will you give the rocket armed, virtual rookie to succeed? How long will it be for Kiffin & Co. before they pull the plug?