I'm not sure EVERYBODY it's on the OVER, I can assure you most sharps are on the UNDER and the BIG MONEY AMOUNT too, that's why the line it is 55.5 some places. The public of course it's on the OVER but not so much money involved.
What I want to say it is everywhere I listen , PROs are speaking about Brady slow start in SB until now and the fact they should eat clock and run the ball and of course they will try to do this, but I'm not sure this will work and if he doesn't work, Brady will need to play catch up type of game and good luck with the UNDER.
Of course the UNDER can hit and it's the logical way to go based on the principle Brady will try to slow down and eat clock as much as possible but I'm pretty much convinced that the 4th quarter will be high scoring depends on the team who will play catch up, so you will sweat a lot for this UNDER.
Good Luck !!!