For the most part they are shorter than normal and that is why they don't have FP available but last year I really could have used a FP for Space Mtn as the line was probably 60 minutes? If I remember correctly. But it varies through the night. Go during the parade or other gatherings.
do most party goers take advantage of the 3 hour early entry? wondering if there is a window of low lines when the party starts and they clear out regular guests?