Line movement for Ravens/Vikings...

I understand the argument for both sides of this game.  Ravens lost two close games, they won't lose 3 in a row, and Minny hasn't been tested.  On the flip side, a 5-0 team is laying a field goal or less, Ravens aren't the same defense as last year, AP will have a banner day, and the 2ndary has been exposed and will be exploited. 

I am leaning towards the Ravens but feel like there is a disparity between the consensus noted on Sportsbook.com with 86% favoring the Vikes, with 87% consensus on the Vikes with Covers.  The line came out with Minny – 3 even and has since dipped in a few shops to below a field goal, with most shops maintaining a -120 to -125 if you want to back Baltimore.  If there is such a large amount of wagering on the Vikings, why is the line not bouncing to 3.5 and back down again? 

I have been on the wrong side of a tight spread like this too many times with the most recent sting on the Titans on Sunday.  I just feel like there is not a direct correlation with the consensus/spread movement, but am hoping Baltimore figures out a way to slow Farve down, and make some big plays on defense.  The Tyree addition will not amount to much since he needs to learn the system, but regardless this is a huge Gut Check for both teams.

I understand the argument for both sides of this game.  Ravens lost two close games, they won't lose 3 in a row,