Yeah, yesterday, I opened the app a couple seconds after it rolled over to 7:00, it came right up and I was able to join and get group 23. This morning, did the same and I kept getting a line that said trying to load the information. Same with my wife. Eventually at 7:03 I got in and got group 123. Lots of others around me were similar. The park definitely seemed more crowded, they had all 4 no bag lines opened individually today (yesterday was one line feeding 2 detectors) and by around 6:50 the waiting crowd was backed up to the turnstiles and they had to move the ropes I guess.
I did notice they changed the backup groups to start at 125 today, where it was still 113 yesterday.