Connie: Totally in agreement - BMI is such a poor measure of actual health, when you're looking at the minute (and random!) intervals that Whole Foods is using. Under Whole Foods' system, I would fit into the "Gold" category instead of "Platinum" based on my BMI. However, 2 years ago, before I started running, I did have a BMI under 24. In the 2 years that I've been running, I've gained 10 lbs overall, but gone down a dress size.... I simply replaced my body fat with muscle. Body fat tests reflect that I have very low body fat, but my BMI (and the scale!) would indicate that I've gotten LESS healthy since I started running. Simply not a good measure of health, if you're rewarding for BMIs that are below the "healthy" threshold.
Or, take my SIL. She is a world-class athlete (in fact, is going to the Vancouver Olympics next month) in cross-country skiing. XC is a sport that requires huge amounts of both upper and lower body muscle to propel your body through the snow and up the hills. My SIL has a BMI of 27, despite the fact that she does not have an ounce of fat on her body and trains 40-60 hours a week. According to Whole Foods, she would only qualify for the "Silver" discount.