I just went on the 3rd and 4th and lines were pretty long. Nearly everything had a pretty decent wait time. I was in the parks each day right at opening and left by about 5pm on both days.
I went with 4 other people to MK, AK, and Hollywood Studios. Maybe there was just a lot more people than normal in the parks, but every park I was thinking "Wow, I've never seen this many people in line for this", and I go to the parks about once a month lol.
Idk if it has anything to do with the extra FP+ selections being available, but some of the wait times were pretty brutal. If that is the case, then hopefully by the time you go in about a week they'll have it under control a little better.