Pull out any movie from, oh, lets say the 60's, 70's, even many from as late as the mid-80's. Everyone in those movies has a butt, some good, some bad, some bigger, some smaller, but all there and often including a real chest. Pull out a recent movie (that doesnt include J-Lo) and try to find the woman with a butt, let alone a good one.
No one else thinks its odd that the modern vision of feminine beauty is plastic boobs needed to compensate for the malnutrition that leads to these women having a 12 year old boys butt?
The article didn't say anything about age, and I've seen a lot of large butts walk through our clinic each day. I think this is a legitimate study. In fact, last week my co-worker had to give a shot to a large lady, and the comment we made was that the medicine probably wouldn't make it to the muscle.
Oops; it does mention ages 21-87. However, I still say that this is a legitimate premise.