Interesting photots Gailene. I have the exact same dance posture. I was recently told by an instructor that my dance posture wasn't "correct" because like you, I lean back just a bit. I think that tiny bit of lean is to offset the weight of the pelvis coming forward and straight though.
Any thoughts?

This is a good example of how the pelvis should be oriented... The only thing that I would add to the "after" posture is a soft chest lift, which would engage the muscles between the shoulder blades, and push the shoulders back and down, opening up the sternum and adding an added appearance of strength and confidence to the dancer.

exactly what i was going to say asharah!

Keeping the knees bent like that will cause many more problems than it's worth. You can achieve the same lengthening of the low back by working on stretching the psoas and hip flexors, thereby aligning the pelvis with straighter legs. For more information on why squatting is a bad idea, check out the Hadia's teacher training tribe. Hadia provides a bunch of excellent reasons not to keep the knees so bent.

Hrm, I don't see that as squatting. I see it as soft knees, which are necessary for freedom of movement--the knees are the "shock absorbers" of our hips. That is, if they aren't bent, there is no "give" for the hips to move, and the head will bob.

As to the comment about being "back"...I think it's an optical illusion. If you look carefully, you see her hips are always oriented directly over her feet.

Lastly, the chest lift...I think the OP was probably focusing on just the pelvic tilt and not the chest. But if that was the intent, then the chest should be softly lifted for cabaret, and a bit more dramatically lifted for tribal.

There is shortening of tissue in the lumbar region in the before picture and there is still a shortening of tissue in the lumbar region of the back in the after photo and the shoulders are definately being pulled forward. It seems to me that the posture hasn't improved in a healthy way with the bending of the knees, which seem from this photo to be far to bent. Both photos seem out of balance.