I had never heard of a plus/minus reading of road wins to home losses before reading the latest Power Rankings at ESPN.com. Mark Stein points out that San Antonio has a better reading (+17) than Dallas (+15). I thought I had heard of every stat that was out there, but I was wrong. My question is, what does that stat really tell you? I know that you’re supposed to win at home, but it’s harder to win on the road, so I guess it could have some value, but it seems pretty worthless.