I highly doubt this. Have you ever hustled? It's extremely hard to hustle the hustlers. He was playing the top players in the entire world, not some fish filled pond in Atlantic City.
Additionally, luck still plays a huge role in the short term no matter how skillful you are. You can't bluff/draw every hand and win over the long term. I can't lose to you for thousands of hands and then suddenly flip a switch and make it up in one hand. This is where/why the pool/golf/prop etc hustles work.
Poker is really about the long term unless you go on a short streak (such as perhaps Isil did) and get out. Otherwise the skill factor will eventually kick in; Even if it takes 1million+ hands before you can even start talking about the "long term" there is no real way to hustle anyone over that amount of hands. Poker wisdom is: "The long term is REALLY REALLY long."