I think they look pretty good. It does portray the two opposite ends of super thin to overweight well.
As far as the real life discussion goes. Both sides are made fun of equally. I was teased for being too thin. Then I was teased after puberty hit and I got my mom's chest and hips for being too fat. Both situations are awful. Worse part is I was healthy both times. Some people are naturally thin or fatter and can still be healthy.
Take my husband for example, he is naturally thin like the pictures show. He has always been the tall and lanky kind of guy. Doctors say nothing is wrong with him good cholesterol, iron, and fat level percentage.