They have been posting about this all week in the NFL Forum, I'll just post My reply there.
The true line comes out at -8. Not only do you have to consider the worth of Home field advantage, which many would say is over the conventional 3 ( I have it at 4.5) but New Englands spread has been inflated for some time. Whether The books carry this over in the play-offs is uncertain, although this game will have low drives total they may still be feeling the early season cost.
Total is 48 without considering the Weather. :drink: