They are on Pace to break the record by 25 points. Its still early and of course Brees would have to be healthy for all 16 games.
In 2009, through 5 games, the saints have scored 192 points.
In 2007, through 5 games, the pats had scored 182 points. The Patriots then proceeded to score 150 points in their next 3 games.
I doubt the saints can hold that pace.