I mean, it's a he said/she said thing from what I can tell. 

Casey said he lost the majority of his chips QQ < AA and then got it in with a flush draw against a made hand and bricked for the rest of his stack.

Then others were saying, no … this didn't happen. That the hand where he said he lost the majority of chips the board was Qxxxx and also a paired board so people are saying the HH tweets are false and that it was a spewy bluff being covered up etc. etc. I think A6 is the hand that keeps getting thrown out there. 

I've read tons of tweets and timelines on this and some of the tweeters sound very sure of themselves and say the woman who won the hand will also verify, but we as readers weren't there so who the hell knows …  

Also, it seems like John Kim is really well known in poker.