I went last night as well, and had a much better experience than Thursday. We also decided to wait until around 10pm to even arrive, seeing how many of the lines went drastically down after midnight--not to mention staying a bit cooler.
I'm sure it was more because of the heat, but for the most part, most mazes had lines about 30-45 min. But there were also lots of short fluxuations... for example, one minute a maze would be a 20 minute wait, and then half an hour later it'd be a 45 minute wait, and then an hour later it'd be a 15 min wait, and then later still it'd be an hour wait. Some of this could be just incorrect estimations of wait times, but I also do sort of feel the crowds are trying to figure out the high points as well.
As for the longest wait times, Insidious seems to be getting the most demand, hitting at least 80 minutes (the highest time we saw) for a good while... and even at 1:30am, it was still a 50 minute wait and looked it. Meanwhile, Ghostbusters right next door is a total walk on. TCM seems lower in the first half of the night, but gets longer into the night, settling in at about 60 minutes much later into the night, which it was usually 25-30 minutes for the earlier part of the night.
Terror Tram had about a 45 min wait at about 10-11pm. Only about half the queue was being used, but the line moved a lot slower than it usually does.
Weekend, while it does have some peak moments in terms of wait times, also had a lot of moments (especially later in the night) where it had 20 minute or less lines. We even did it twice, because at about 11:30pm, half of the queue inside the soundstage was empty. Aside from TCM, the lower lot really dies off late into the night.
And when we arrived at about 10pm, TQP and Monstrous were listed as about 20 minute waits, and basically stayed pretty short until around midnight, where both got to around 60 min or so and mostly stayed that long... clearly, a lot of people are hitting those mazes on the way out.