Now, I'm not really familiar with your scoring system and what kind of ramifications it would have on positional rankings, but my philosophy on QBs is to assume that, if they're any good, they'll at least be contributing by their second year as a starter. Tom Brady was widely panned as a game manager early in his career, but he finished 10th, 11th, and 11th in his 2nd-4th seasons. In fact, pretty much every eventual top-10 QB winds up with a startable fantasy season within his first two years under center. There are exceptions (Drew Brees wasn't startable, from a fantasy standpoint, until his third year, and Ben Roethlisberger was dynamite his first two years but didn't have the volume to make a fantasy impact), but they're rare. If Teddy Bridgewater is the real deal, he should be giving low-end QB1 production within the next two-three years. Or, to put it another way, unless Bridgewater is a bust, you should be able to get 2+ startable seasons out of him on a 4-year contract. Again, I'm not familiar with your scoring system, but according to PFR, Luck/Griffin/Wilson have so far combined for five top-12 finishes in standard scoring, including a 5th place finish by Griffin and a 4th place finish by Luck. IF Bridgewater is any good, he'll likely be producing similarly by 2015 or, if he takes a little bit longer to develop, 2016 at the latest.
As far as making that jump to true first-tier QB production... that jump is never a sure thing. Some guys make it, some guys don't. A lot of really good QBs never make it, which is why I had Drew Brees over Andrew Lucky for the last two years- I thought Luck was a stellar prospect, but there's no guarantees he'll ever reach the heights Brees is performing at, even if Luck lived up to expectations on the field. In that respect, if you really want that elite, high-end production, the only really reliable way to acquire it is to trade for a proven stud like Peyton, Rodgers, or Brees. It's just a matter of determining whether that's the best use of resources, or whether you're better off settling from second-tier QB production on the cheap and using those resources to upgrade elsewhere.