John Clayton arguing that the Redskins are now co-favs to win the NFC East:

Despite being 33 years old, McNabb can add to the Redskins what Brett Favre added to the Minnesota Vikings last season and Steve McNair added to the Baltimore Ravens in a trade in 2006. Franchise quarterbacks add points to the scoreboard. Favre added 5.7 points per game to the Vikings last season and they advanced from a 10-win team to a 12-win team. McNair added 5.5 points per game to the Ravens in 2006, and they had a 13-3 season. 

Maybe, maybe not. Again, this strikes me as rather simple analysis of a really complicated situation. I think the Cowboys could be anything from 7-9 to 12-4. Who knows? Same for the Redskins. I suspect McNabb helps--I'd certainly rather see Jason Campbell--but I don't know how much.