Iceland Sven and Iceland Annie had never done a GHD situp before the 09 Games. They have been training a Bootcamp style for years. Their general fitness and athletic abilities were tremendous. When it came to perform some of the more technical drills on Sunday, they did amazingly well given their lack of exposure.
They mention that they have only been doing CrossFit for about a month and a half. But recently they sent in video from Iceland of their Bootcamp program. As you can see in these two links, they have been practicing a variety of functional movements executed at high intensity.