I still think at some point you have to consider drafting the rookies. I'll go back to the example I used at the draft, he hasn't been a world beater but I'd still take Ed Davis over Antonio McDeyss for one year. McDeyss has the provent rack record, but I think at some point you have to be able to project that these lottery picks would be able to put up similar numbers w/ similar minutes with a much higher ceiling.
But to me it is all about context and fit. Numbers are one thing, and they're important as an evaluator of talent, but fit and efficiency and consistency are the bigger deals with rookies.
Example: DeMarcus Cousins
He's getting 11 and 7 in just 24 minutes...that's good business. But, he's also shooting just 40%, and his opponent's PER at the center position is 19.5, which is well above average.
Example: Greg Monroe
He's a big getting used to the NBA, so his low production is okay. Opposing centers do better against him than they do against most other people, and he only shoots 44%
Example: Derrick Favors
-I think Derrick Favors has shown he could fill a role similar to the one (time-wise) to the one that Leon Powe filled for the 2008 Celtics. He's a rookie I think that can be relied upon to be a backup big.
Ed Davis hasn't really played enough (and I haven't seen him at all) for me to pass any kind of judgment.
Blake Griffin and Landry (Clark) Fields are the 2 guys I think could start on a competitive playoff team, and for different reasons. Landry Fields plays off the ball and plays amazing defense for a rookie, plus he can hit a 3. Blake Griffin can start because he defends, he finishes in transition, and the rest of his game is coming along..and he's been consistently good.
Even John Wall couldn't start for a playoff team. Too much learning curve for a point who loves to dominate the ball.