Nothing fishy about it... There have been articles for weeks about "riding the hot hand" They can bring Romo along slowly, because Dak is playing well. If Dak played like trash for an extended period, they would've wheeled Romo out there on a gurney. Dak is playing well, Romo can get stronger.
Kristi Scales said it best. Their probably won't be an announcement, but you will be able to tell by the practice reps and whose getting them with the first team.
Edit: Having said that, I tend to pay attention to locals than nationals. No knock on Schefter or Caplan, but the national guys aren't there everyday.