I don't think the public hammers lines so early in the week. They usually do it the day of the game or the day before. What you'll usually see is sharps throw some money down to get the line moving down to spot they like and then unload on that line. So, in this case, the line started at 6.5. The sharps want the Broncos, but not at that line so they throw down a lot of money on the Patriots so the books have to adjust the line in the favor of the Broncos. Once they've done enough of that to get the line down to say..3 or 3.5 then they unload even more money on Denver. Much more than what they placed on the Patriots in order to get the line to move.
The line should keep falling the closer we get to Sunday. In fact, I'm doing the same. I have N.E. at 6, but if it gets down to 3, then I'm going all in on the Broncos.