I was there yesterday around 6 and the wait was less than 10 minutes. It was May the 4th so big draw for Star Wars fans but lots of rain so may have kept families.
I waited about 20 minutes today at 11am. The location is not particularly obvious as the queue is away from the main path and there is just a small sign that indicates he's meeting. The meet times are also not on the Times Guide. Time will tell.