The problem with this statement is your assuming that the national media does their research. Campbell has all the physical tools and seemingly, the intangibles and the college history of success at a big school and that's why he is a prototypical franchise QB. The media looks at it, and says, hey, that's normal for a young QB and we've seen this road walked a lot, and he has all the advantages in the world, so he'll do great.
Romo is far too unknown to make anybody comfortable. Sure, he put up a big QB rating, but he also coughed up the ball 15 times to his 6 TDs those last couple of games. So, not having much of an opinion on him before this season, they'll naturally be slightly more gunshy as he doesn't have the physical tools and draft reports that Campbell does.