Thin is still in, but apparently fat is nowhere near as out as it used to be. A survey finds America's attitudes toward overweight people are shifting from rejection toward acceptance. Over a 20-year period, the percentage of Americans who said they find overweight people less attractive steadily dropped from 55 percent to 24 percent, the market research firm NPD Group found. With about two-thirds of U.S. adults overweight, Americans seem more accepting of heavier body types, researchers say. The NPD survey of 1,900 people representative of the U.S. population also found other more relaxed attitudes about weight and diet....