[RoShamBo]

It helps but I wouldn't say it is necessary for improvement. It just comes down to athletes and coaching. I've watched a lot of high school football around the Atlanta and DC metro areas over the past ten years or so, two of the hottest areas for football talent in the country, and most teams there run it 80-90% of the time. If you have the talent you can run whatever offense you want. I will say you can do more with less in an offense like the spread though.