Ugh, that sounds horrible! Since you were staying on site, how early did you make it into the parks? Were the lines that long before 10 am?
I wonder if this has anything to do with the opening of HMH. MK reservations for
Disneyland booked up very quickly after they announced that it was opening. If locals try for VQ times from home and get an early return time, maybe they end up going to the parks earlier than they normally would have.
Pirates closed for a few days on Thursday. Maybe people didn't realize that it was only closing for a few days and wanted to ride it before it went down.
Or... maybe people were visiting Disneyland before or after SDCC (July 25-28)