I just went back and did a check on this as I listen to his podcast with Len Testa. I don't mind listening and am not as bothered by Jim Hill as some other people are on the interwebz. That being said, he needs to clarify things a bit more when he makes a statement like this. This is from another website that tracks Disney rumors (WDWThemeParks.com) -
June 15, 2015: On
Episode #81 of the Unofficial Guide's Disney Dish with Jim Hill, Jim mentions that the Avatar project is 8 months behind schedule.
Now I understand that schedules can change and all, but when under six months ago you make a statement that the project is 8 months behind, and now you go on and indicate that they are shooting to open 4-6 months earlier than originally hinted, I think you need a bit more of an explanation. This is the type of approach that hurts the credibility of the 'insider' moniker.