This from our friends at Covers.com
These division opponents actually played three times in 2012. New York won 31-14 on January 1 (total stayed “under” 48). Dallas won 24-17 on September 5th (total stayed “under” 45.5). New York won 29-24 on November 28th (total went “over” 47.5). The Giants were 1-3 in the preseason, scoring 71 total points, while the Cowboys were 2-3, mustering just 78.
This line is currently higher than any set in 2012. With each team’s offense struggling coming into the 2013 campaign, and with a recent history of playing to tighter, lower-scoring affairs, this number is likely to drop a bit. Get down now if you like the “under”, or wait if you’re going to play the “over”.
Although it’s difficult to project from one year to the next in any sport with the personnel changes, but this sounds like pretty sound advice to me.