I got on at 2:26 MST and it said 6 minutes. It went down to 2, then fluctuated between 2 and 1, less than 1, then up to 22 minutes and then 44 minutes, then almost immediately back to 2, then 6, then 2, then 3, etc. So far the initial 6-minute estimate has lasted 90 minutes.
Meanwhile, the bar has never been close to the right edge yet, but it is moving that way.
ETA: got through in just over 2 hours (4:30 MST). It looks like May 4 is sold out but May 3 and 27 still available.