I don't think they would start that late, they try to suck in as many days as they can. Last year it was odd that the first 3 weekends were non peak though.
Actually they'd have the same amount of days even if they start late this year because as previously said the last night of the event would be Nov. 7 when its usually the 2nd or 3rd.
So either way its pretty much the same as what they've been doing. They just push the dates back.