He's stopped doing them for now. He did a post on it, but he said this on his forums the other day, which I think is ultimately a better explanation:
"Disney did away with their long term predictions back in March and they're not saying anything more than two weeks out.
Last year's crowds aren't a good indicator of this year's crowds. The summer has been completely dead. June saw lower attendance than virtually any time since September 2012. The last week of April this year was busier than Easter. No crowd calendar predicted that.
Can't really go by wait times since Disney now reduces staffing so much when they're expecting fewer people. So you can have half as many people in line and still see longer waits if a ride is running with half the vehicles on the track. Avoiding Extra Magic Hours is antiquated advice. Animal Kingdom wait times this summer have been longest on Tuesdays. So I guess what I'm saying is that I don't have any information to provide.
I could make it up like the "competition" and spend 20 minutes every month color coding the travel agents calendar based on when EMH is, but it wouldn't be accurate. So I don't know." (Source:
http://www.easywdw.com/forums/showthread.php?33926-April-2017-Crowd-Calendar)