Italiamom - I think the guys look a little tight to me, hence the splayed feet. But I've been looking at picture of women squatting on flickr all afternoon, and that is the basic work/rest squat for women all over the world. Their feet tend to point more forward and parallel, and sometimes the knees come past the toes, sometimes not, and the butt rests on their heels. Sometimes they are leaning through their legs to work, sometimes sitting very upright. They look very much like pictures of the kid, or a more supple version of the men squatting. The sacrum sometimes is pointing back, but at the least doesn't round inward and stays up and down - not pointing back, but probably still keeping the pelvic floor taut. I wonder if Katy recommends butt out squatting because as her audience is chair-sitting westerners we are chronically tight and need something more extreme to get us into the correct posture. Or perhaps the pictures I found are just part of a range of motion of squatting that includes both butt out squatting and butt resting on heels squatting? I am convinced that I need to lengthen my glutes, at any rate, but I also find this sort of butt on heels squatting an improvement to sitting in a chair. I'd be interested to hear what she has to say.
These two are kind of hard to see but they show a similar posture.
this one actually looks like what katy recommends http://www.flickr.com/photos/nygus/896516490/
this one too http://www.flickr.com/photos/boycebw/851587768/
None of the feet are splayed in these, which suggests that these people do more squatting than the men in the picture I posted above. But it's hard to tell if the tailbone is tucked or not. I think a good indication is if the upper body has freedom of motion. You will be unbalanced if you try to move your upper body with your tailbone curled in.
At some point in her blog Katy does talk about how it's good to change up the sitting posture so it's never exactly the same, too. So there are all kinds of squat variations.
Also, you might want to google "glute activation" - sometimes we are so out of balance that we do not use our glutes when we should be using them. Or you might just have great glutes and great posture, lol!
Edited by cyclamen - 12/19/10 at 9:55pm