That depends on what time of the day you try to use it.
I've been during the summer and had express passes for Hulk at noon. It was a 20 minute wait, the line went to the bottom of the stairs. Same thing on my trip last year in June. Went to USF in the afternoon at 2pm, and the wait for the Mummy was 20 minutes. Again, the line went all the way down the stairs.
That's why I tell most to avoid the park from noon to 4pm. It's hot, and that's rush hour, even if you do have FOTL. I go early, rest in the afternoon, then come back in the evening.
The good thing about summer hours, is the park stays open late. I have the RPR booked for July 6-8, did it on purpose so we could see the fireworks.