Just checked this at profootball reference. Since 2009, the Saints have served up a total of twelve 40-burgers. Our W-L record when coming off a game where we score 40 or more points is 10-2. Make of that what you will.
I was looking at this Monday and was surprised to see this as well. We also followed up several of our 40 point games with another 40 point game. It shouldn't be a shock though, we've always been a bit on the streaky side. We'll have 4 game stretches where we go 2-2 and look shaky in the 2 games we win. Then we'll have 4 game streaks where we dismantle anyone we play.