i seriously doubt that the new suits create more drag than the nude body. they are designed to minimize drag and smooth out turbulance. the really expensive ones channel water almost like sharkskin. I dont know where the swim teams practice nude, but no one I know that was ever on a swimteam practiced in the nude. Although it might be more fun with a co-ed team but I am sure the guys would be too embarrased to do it. that water is COLD.