Because the Seahawks are not 0-3 on the road in the playoffs like the Saints are under Coach Payton
**Since 2006, on the road in the playoffs, the PEDhawks are 1-4; their only road playoff win was @ Washington in 2012
Because the Seahawks are not 2-6 in games below 40 degrees
Because the Seahawks just beat the Giants 23-0 in a game they didn't need to win, and the Saints got completely embarrassed and dismantled by the Rams in a game that could have won them home field
Because the very stat you cite about points per game, shows that one is a good team on the road and the other is not -- 23 is GOOD, 18 is middling to mediocre -- of the top 3 or 4 playoff teams in each conference, can you name any others who score that little, on the road - most are in the mid 20s.
Because the Saints lost to the Jets and the Panthers blew out the Jets
Seahawks are better in point differential of victory on the road -- they win by more points and lose by less
Seahawks are better on 3rd down defense on the road
Seahawks are better on turnovers on the road

I could go on but thankfully I'll stop. You keep pumping the sunshine about the Saints as a road team, and the fact is that THIS YEAR they are just NOT a very good team on the road, in fact they're barely average. There's simply nothing scary or intimidating about them once you take them out of the Superdome. Do you think the Panthers are SCARED of the Saints right now? They're not. They're licking their chops. We'll see if Payton can right the ship and get it going.

Until the Saints win some convincing games on the road (and I hope they do) the label will stick.