Yesterday, it had Toro at 25 min. We walked over and it was 5 min (single switchback filled). Then, by the time we were on the platform, it was already back up to ~25 (first set of switchbacks filled). Yes it's imperfect, but sometimes it's unavoidable).
EDIT: Also, I see this as a flaw in the design but you do need to remember to manually refresh. Looking at wait times leftover from the last time I opened the app has messed me up in the past.