As you already know, XigTeam, a new Chinese Dev Team, has been making a lot of noise in the jailbreak community since the last week.
Recently, they set the release date on “September 31” erroneously. This created a furore on Twitter and a lot of users began name-calling them.
However, they later clarified that it indeed was a typo and the actual release date is, in fact, September 13th, 2017.