All up, a call for "concrete examples" is exactly what should be going on. From Tim. Not from the unbeliever. The cliche is "the onus of proof is on the believer". Tim's extraordinary claims about drug-free muscle gain, for example, should have had a third-party drug test involved as well as being put in context with his previous and subsequent physique. His extraordinary claims to be a martial arts champion should come with names, dates and number of competitors in his division. Etc.
All I know is that when Ferriss's claims intersect stuff that I know about I can tell he's full of it. This doesn't raise my level of faith about anything else.
He didn't prove his ability to fight was superior. He didn't prove his mastery of martial arts was superior. He proved his ability to push his opponent over the line.
If there were no line, he'd be crushed.
But, by his definition, and by those set up by that martial arts sport, he did win, and he got the title/paper to prove it. What can you say, some people like titles/papers more than the actual process :)
http://www.therpgsite.com/showthread.php?t=14095
For one thing, the strategy he came up with is not unlike the use of suicide bombers in real life conflicts. I expect something similar will apply when large numbers of small, cheap autonomous drones start being deployed. It has real-world applicability. It was also effective, I believe, in EVE Online. Plus, it was an interesting application of technology. It wasn't just "shoving".
By comparison, Ferris' shoving tactic is virtually useless outside of the context of a ring-based martial art competition. (Maybe if you got in a fight on the edge of a cliff, or on the roof of a building, or next to a pool of sharks...)
And when he's talking about winning the martial arts fights, he goal was to "WIN", not to play the game. And like gursikh says, either put up or shut up. We need concrete examples!
Overall, I think Tim has done a lot for a lot of people with the ideas that he shares in his books.