Since this weekend, yeah waits for TF has been around 90 minutes, while Ive seen DM get as high as 130 minutes. So I think that it isn't necessarily the popularity of the ride, its about capacity. I don't have numbers for either, but Id be willing to bet that TF gets more guest through than DM. In DM, you have to sit through 2 pre-shows at a dead stop, wheras in TF, as long as there isn't a breakdown, the line is always moving.
While I agree that Universal as well as many of us here expected more crowds, & it isn't as busy as we anticipated, I don't think just because TF hasn't reached a 3 digit wait time doesn't mean its not highly successful, or "weird". To me, it just seems TF just has great capacity & eats people faster than most rides. & again, it hasn't even been open a week yet, let alone a whole summer, so any of this could change at any time. Only my opinion.