it's hard to believe that they could be that lean and still carry that much visceral fat
sorry, but i don't buy it
you have no idea what you are talking about.
3 month diets dont do much for visceral fat and the constant rebounding and yo-yo dieting that is competitive bodybuilding plays a large role in the buildup. Combine that with exogenous insulin in large doses for extended periods of time, GH desensitization and you have a recipe for greatly accelerated visceral fat buildup
As previously mentioned, though, a lot of the distention is from carb loading.