I agree Saints ave is good but it has been boosted by playing thier 2 closest rivals 2 weeks running and both away teams taking 5k or so. If Wigan continue playing this well I reckon they'll take the top average this year.
The real point about having a good Wigan is htat when tey are going well I think it is fair to say they have the biggest travelling support so in a sense all ships rise of the Wigan tide. Sort of like the Dragons here. Whatever about home support the Dragons in the top 4 will average over 20,000 away with the travelling Dragon Army. Same with Wigan isn't it? 5,000 on Lancashire crowds and probably 3,500 on Yorks crowds when Wigan are in town.