Jersey week is real, Jersey week crowds are a myth. Election day is usually only a factor during major election cycles and 2015 is not one. There is NO free dining that week and Marathon crowds wont show up until the latter part of the week. Our visits to DW are always the first or second week of May and again the first week of November. The crowds are almost always identical. Crowds get bigger every year, but that applies to every day of the year compared to the previous.
If your looking for the lowest crowd levels for "Jersey Week" 10/31 - 11/5 would be the best days. Touring Plans estimated crowd levels, currently, claim the opposite, but I suspect they will adjust them as the dates get closer. It wouldn't be the first time they are completely off base.