Have you noticed that all of these shows, except Survivorman, their biggest claim to expertise is the fact that they were in the military? Personally, that's always been a red flag, for me, when I've led bush training. They always seem to have this over confidence that gets them into trouble, and every response is, "in the military they taught us how to...".
Personally, of the dozen or so that I've led in, only half have stayed the duration, and half again looked so disheveled that I thought I'd have to drag them out.
Now I'm not trying to disrespect the military, quite the opposite. Only, I don't think being in the military automatically qualifies a person for wilderness survival.