I realize I'm a little late to the game here, but I figured I'd post just in case anyone in my size is interested in buying one of the new Anvil shirts for the first time.
I spent a long time on this message board trying to figure out how the new shirts would fit me. I'm 5'4", 160 lbs, and I wear a 36DD bra, hips are also quite large - definitely not a "bean pole" (which, by the way, is an incredibly offensive term), more of an hourglass. I usually wear a size 12. I figured I'd go ahead and get a shirt, since Woot seemed to suggest with the bean pole comment that the new Anvil shirts would be better for women of my shape and size. I went according to the new size chart, and ended up getting a women's M (at threadless, I'm an XL). I was definitely right to go with the size chart, even though I'm in XL in every other t shirt on the planet (AA included). Shirt fit well on the shoulders (in that it looked good), but it was a little tight on the arm pits. It was also a little tight around the bust, but it wasn't very noticeable. However, due to the strange shape of the shirt that you've all heard so much about by now, the shirt, despite being form-fitting on my upper body, was VERY loose on my waist. Normally loose waists are a good thing, right? Well, not the way this shirt fits - it hangs off my breasts and doesn't come in at all at the waist, making me look like a box, despite my status as not-a-beanpole. I tried washing it in cold water (twice), and it shrank significantly each time. Initially it was a good length, but now it looks like a kid's shirt (still really loose on my waist & hangs off my breasts, though!), and despite my being quite short for my dress size, I can no longer wear the shirt out because my midriff shows. Definitely not worth the $12 I paid.
Additionally, for those wanting to do men's sizes as an alternative, I did pick up a men's M (going by the size chart). Fits well on my shoulders, bust, and hips, and it has a nice length, much longer than the W shirts. However, since it's a men's shirt, it is quite loose on the waist (does come in more than the W shirt, though - I'd say the men's sizes are more flattering for an hourglass shape). I'd probably be better off going with a Men's small, although then it might be tight on the bust. Just something to keep in mind if you're wondering how the M and W sizes compare.
Needless to say, I don't think I'll be buying another Woot shirt, unless they switch to a better brand than Anvil.