ERs run on triage, (and lots of people go to the ER for things which could be handled by an urgent care or family doctor instead), which means wait times entirely depend on your specific situation. Mildly upset stomach? You’ll probably be waiting at least a few hours,

Canada is the same, I went in bleeding badly and was seen right away. But another time I went in just needing my finger sewn and it took around 3 hours to be seen.