Seems like the late openings for all the other parks impacted the initial serge of BGs. Yesterday There was only an hour difference in rope drops and I’m sure that not everyone is educated on the BG process at the start of their vacation. so when they went to another rope drop it caused them to arrive later To DHS to ride, it was explained so they came early today.
I definitely think that is going to be a factor. We're heading January 24-27 which should be a "light" day. We've planned our days but realized that if DHS opens at 7am and the park we're planning on going to first opens at 9am, why not just give it a shot and head to DHS from 7-9 and see if we can get lucky with an early boarding group (particularly on the day we're planning Epcot since we can always pop back over to ride if we want). It's really like DHS has morning EMH for everyone for a while.