You might be right. Apparently he "would not divulge his betting strategy" (http://www.pressofatlanticcity.com/news/breaking/meet-the-blackjack-player-who-beat

You might be right. Apparently he "would not divulge his betting strategy" (http://www.pressofatlanticcity.com/news/breaking/meet-the-blackjack-player-who-beat-the-trop-for-million/article_86f42838-83c8-11e0-92d7-001cc4c03286.html http://www.pressofatlanticcity.com/news/breaking/meet-the-bl...), which means we won't be able to even know if he is an advantage player or just got really, really lucky. Nevertheless, the article I just linked to says that $100,000 per hand is the highest maximum Johnson has ever heard of, so assuming he is in fact the only person betting this much, and since he claims to have bet that much only because he's using a mathematical strategy that puts the odds in his favor, a liberally applied combination of Occam's Razor and Bayes' Theorem suggests that the positive outcome is likely more than just luck but that the odds really are in his favor.