The older demos are becoming more and more important to advertisers (or should). As baby boomers retire. the demo grows dramatically and many have planned well for their retirement. While they are not likely targets for beer and soft drinks, they are certainly a valid target for cars, boats, RVs, travel, second homes, furniture, and electronics. Smart businesses will target them!
With Arbitron's changes and fewer stations subscribing, the ratings are way less relevant. Radio sellers need to lean how to sell radio!!!