I have the video clips from Breastwatching.com, and the stills graciously provided by turbo.
One thing that strikes me about "Peggy" is that her body is not particularly large. Sure, she doesn't have a small frame, and she's a little flabby, but nothing major. The casual observer wouldn't realize how much of what's under her shirt is breast tissue until she takes off her shirt and removes all doubt. When she hoists the Pepsi into her shopping cart, though, you can see the amazing distance that her shirt hung in front of her jeans.
Another thing is that I was surprised by how enormous her breasts appeared when she was braless-- even knowing how she appeared sans shirt but with bra.
Also, she has almost no hips, which seems counter-intuitive with such large breasts. Not unheard of, though, since I know a couple of ladies who have the 'just the top half of the hourglass' effect.