I saw surviverman totally FREAK out while on a raft at sea with a storm coming on. He pulled the plug, his backup boat comes, picks him up and drops him in the next morning. Funny after that episode I haven't seen a new surviverman since. Could be wrong but I think he decided their had to be an easier way to make money. Also I've seen Les do some very very stupid things. Things that you would not want to do in that situation.
Bear does a much better job of explaining the dangers, showing you how to survive. He does cheat with his fire making, would love to see him get that right. Have him show different possible methods of building a fire from scratch.
As for the foods, well surviving is as much about attitude and whats going on in your head as anything. If you want to live, you have to accept that you will do whatever is required. Just put your mind to it and get it done.
The urine trick he did in the outback clearly showed he was choking that stuff down. He was NOT enjoying it. Also I'd only play that trick once, and early on at that. The longer your dehydrated, the more the urine concentrates the bad stuff you need to get rid of. Recycling it through more than once could seriously overload or damage your health.
Both guys move a lot more than the average person would in a survival situation. If your injured at all, disoriented, lost, etc in most cases your better off moving as little as possible. Build a fire, find water and wait for rescue.
Only if I knew that no one would come looking for me would I attempt to walk out of some of the terrain that both guys have shown.