The LVH Super Contest is also only 85 total selections, which is far from a credible sample size. If someone can hit 58% assuming -110 against a pointspread over a large sample of plays they are likely one of the most successful gamblers in the world.
85 games if plenty creditable enough for me. I also believe there is a certain amount of luck involved with the LVH Super Contest. Fezzik won it back to back, this year he finished middle of the pack, does that make him any less of capper?
And 58% is misleading. The amount of the wagers makes the percentage moot. Lets say you make 10 wagers, one is for $200K and the rest are for $500. You win the $200K and lose the rest. Your winning percentage is 10% yet you are successful.