with 10% vig, isn't the break-even actually 55%?
say you made 100, $1 bets. you'd have to pay $110. so, you'd have to win 55 to get your 110 back. is that right?
anyway, it is indeed impressive that he can get 71%, where he picks 5 games week in and week out. in 'real life', you'd have some weeks with only 1 or 2 (or 0) games worth betting on, whereas on certain weeks, you might possibly see more than 5 worth betting on. so, keeping it on an even keel, and picking 5 games every week... and getting 71%... i can see how it turned out he was way ahead of everyone else.