One thing that I dislike about Tim is that he claims to be very accomplished. If you look at most of his accomplishments, he basically is exploiting a flaw in the rules to achieve a very narrow definition of "success."
For example, his "kickboxing world championship" was actually a small san-shou (a fairly low popularity Chinese version of kickboxing) federation's "championship". In addition, the way he won was by clinching with his opponents and pushing them out of the designated combat area; basically, exploiting the letter of the rules. This was facilitated by the fact that competitors weren't very athletic, and didn't typically cut weight for competition, so by aggressively cutting weight he was able to come in 15-20lbs heavier than his opponents.
Additionally, he claims to have gone from a 300lb deadlift to being able to deadlift 650lbs in an incredibly short period. Buried away in the notes he mentions that this 650lb deadlift is actually done in a smith machine, with the weight starting just above his knees - so missing the hardest three fifths or so of the movement.
Don't get me wrong, some of Tim's accelerated learning techniques are legit, but in general he is more interested in doing something that he can brag about at cocktail parties than legitimately mastering things.