I don't. I really really don't.
Look at Matt Ryan's rookie stats. How do they compare to stats from the 80s? Or Cam Newton's? Or Jay Cutler's first full season? I can go on and on and on.
There will be your Ben Roethlisbergers, who don't put up gaudy stats as rookies, but win, but it's clear the trend of a franchise or at least above average QB is having better, young seasons than the older greats. That's just the new NFL. Joe Montana's 1981 season, his first almost full one in his third year in the NFL, is nothing special compared to this day and age. It's just not.
We can look at two QB's that give us the best view of that, and not even all the way back to the 80s. Compare Peyton Manning's first year stats to Andrew Luck's. Peyton is a Hall of Famer. And his rookie year wasn't even nearly close to Luck's. It's not as though Luck was ten times the prospect either. Would you argue that 23 year old Luck was better than 23 year old Peyton? I wouldn't. But still, blew him out of the water, numbers wise.
In finality, you're incorrect. You really are. Comparing EJ's stats to the 80s or 90s is less than meaningless. Even if you wanna compare him to the greats still playing, right now, somewhere, there's a Jets fan claiming that Geno's rookie year "was a lot like Peyton's," and he's not wrong. But he's wrong that it means anything.