My ass and legs have gotten only bigger with the lifting which makes me look more ape-shaped than I naturally do ( long limbs while being really short and wide ). I wouldn't say they are fat as most of my body fat is around my middle still.
My old track coach used to say look at all the sprinters and don't be ashamed of the booty. Whenever I have gals who are getting self conscious about their thighs and rear, I tell them this ( as gymnasts tend to develop big thighs and glutes in some gymnasts ). I'm not even talking about cottage cheese thighs and big muscles ( as in some of the college gals ) but just big muscles period.