Why would SDD be struggling to accommodate a 35 minute line, or RotR a 49 minute one? Those seem like comparatively short wait times for each ride. So short, in fact, that they might prove problematic for a company trying to charge guests for a new line skipping system.
Also, those numbers are interesting - the first four all inflate the times about the same, adding on about 33% of the wait time. SDD and RotR, the headliners of the moment, break that pattern, and at least double the wait time. Less popular, older rides like TSM and ST are almost right on. Basically, with the exception of ToT, it looks as though the general popularity of a ride rather then the specific, current wait time determines how much a wait time is inflated. Just interesting.