even by late 2005. He only became elite in his fourth year of play as a 25 year old senior, though he showed plenty of flashes of it in his third year in 2005.
In terms of age and experience 2004 Beck is a reasonable comp to 2024 Retzlaff.
Not saying that Retzlaff has Beck-level ability, but the leap to elite for great QBs often doesn't happen in a single year of development.