Average wait time: Less than 5m.

[Iscah]

Average wait time only shows the time of the person who has been longest in the queue and if you are alone in the queue then you will make it climb to 30 minutes. Average time of 5 minutes means that its very alive or that literally no one is in queue

This. It doesn't seem to actually be an average at all.

If you're the only person in the queue, it will feed your own queue time back to you, updated at three-minute intervals.

It may keep a genuine average if there are multiple people completing the queue and getting into the duty, but if so then the calculation falls over when the traffic flow ceases.