Bluehorseshoe:
In the past, I would have agreed 100% with your supposition. Historically, the NFL totals market has been extremely efficient. For a period of ten+ years, the year-end number of OVERS and UNDERS was nearly a perfect 50/50 proposition. When the number of OVERS or UNDERS would become skewed during the season, it would be safe to assume that that the imbalance would correct itself in the coming weeks. A handicapper could use this market efficiency to his advantage when handicapping the week's card as the season progressed.
However, today's market is not replicating past performance.. When the NFL made the announcement mid-season last year that they were going to penalize and/or fine violent hits on defenseless players, we saw a sharp spike in scoring. For the balance of the season up to week 16 ( I downgrade my data for week 17 because so many teams rest their starters in the "meaningless" games of the final week), OVERS cashed at a 55+ % rate. This trend has obviously continued during the first two weeks of this season.
It is obvious that the line maker has adjusted his opening totals this week. Only one game has a total of less than 40 ( and that was a 39.5 on the Pitt/Indy game). Like the line maker, I have made adjustments upward on my totals. My numbers are pretty much in line with the openers. I usually look for a disparity of 3 points from my number before a play is triggered. As of today, I have no 3 point difference on any game.
I would remain cautious about blindly betting UNDERS until the line maker over adjusts his opening numbers. If you make a strong number on your totals, you will know when the over adjustment has occurred. I will be more of an observer than a bettor this week. I will probably have very few plays.
Good luck,
charliej