Not really amazing....just proper, and normal for someone shooting a bow. We all should look like that really, to some degree....its what we strive for. Some of you may not realize that your back may look like that if you have a narrower back.
Also would like to add that this IS a girl with a narrow back, and if you have a wide back, your shoulder blades are going to be farther apart so you wont look like this....and if you try to, you could be over drawing the bow.
And I agree with Rod.....from 9 to 10 o'clock is fine for the elbow....when you get above 10, you can create problems with bow and string torque.