On 5/29, we got in line at 11:47, we were in the castle at 12:07, at 12:24 we were done ordering and seated, and we got our food five minutes after. We walked out at 12:54 after eating lunch and desserts, taking photos in all three rooms, and using the restroom. It's not bad at all. Longer than most QS, but less than an ADR. Considering it's pretty normal to wait a half an hour to be seated for a lunch ADR, I didn't think it was bad at all. We really enjoyed the food and eating in the castle.
Getting in line at 9:30 am would cause you to wait much longer than necessary, because it doesn't open until 10:30.