In addition to the normal queue, there's one for fast pass, and another for single rider.
I used the single rider queue twice, once we walked straight on and ended up with the same rat with a family of four, then the second time which was a little later in the morning we waited around 10 minutes and ended up in the same rat with another family of four.
The second time I went on, the fast pass queue was around 20 while the normal queue had reached 75 minutes, whereas it was only 10 minutes for the single riders, if that's an option for you.
If you're getting fast passes for the ride, at the ride, get them early as you wouldn't want them to have ran out.