You are reaching here. A rookie rb's learning curve outside of blocking is so much less than it is for a cb. Not really a good comparison. RB seems to be one of easiest positions to plug and play in the NFL.
I'm not reaching, like it's been said before, Jackson having to learn the ropes without the benefits of Jaques Reeves' (or Dunta Robinson's for that matter) words of wisdom if anything is only slightly worse than letting him learn with their help.
It's not Jaques was a model pro, or consumate starter. In hindsight, it looks like a mistake we ever signed him for the money we paid.
& Dunta's tutelage is not worth $10 mill. It's not like Dunta would have stopped any of those plays we've seen Kareem get burned on. The big pass to Galloway... would Dunta not have bit on the fake pitch then the fake reverse? That's how Galloway got open, & we've seen Dunta bite on many a fake & not get back in time to cover. That's what happened in Cinci last year, when OchoCinco was wide open, but missed that deep ball.
Do we think he wouldn't have fallen down when Roy Williams beat KJ at the line? It's been so rare that I've seen Dunta press anyone, that I really can't say. I've seen him fall down several times, a couple where the receiver made the catch.
Personally, I think people need to forget about the yards we're giving up (though we didn't give up "a bunch of yards" to Dallas) & watch the kid play. He looks good to me. Many of the yards given up are to zone coverages, where neither he or Quin, or even McCain is at fault.
Looks like we expect our CBs to be perfect, and nobody has perfect corners (save maybe Oakland & NYJets).
Washington is supposed to have a good secondary, Carlos Rodgers, DeAngelo Hall, & Laron Landry. They still got beat for 500 yards.
I'm more upset, that Demeco, Diles, & Adibi have been in the league much longer, and can't keep TEs & FBs from running wild. Sure they were some pretty good TEs & FBs..... but we're supposed to be good (the best LB corp) at LB ourselves... we even say we're deep at times, but don't have an answer for the Cooley, Clark, or Witten.