ESPN put up an interesting stat on SportsCenter today. They listed the QB's who had a 5 TD game before they were 25. Here is the list
Romo
Kurt Warner
Cuaozzo
Van Brocklin
So he is in a group of four with one guy who had a good, but short, run and then fell flat, and two other guys that no one has ever heard of. Plus, when Warner was with the Rams there was a ton of talent around him. Dallas is good, but not that good.
I think it is just a coincidence and Romo might or might not do well, but that is a pretty poor group right there.