I would be surprised if averages for similar sized hospitals in the US were much different.
It's not. I've waited over 2 hours at least twice in the last 10 years.
Not that I'm accident prone!
During one cold snap a few years ago I broke an ankle, and waited in agony for 8 hours for my 10 minutes with a doctor in Mt. Sinai in Toronto. The strategy these days is, if you have to go to emerg, you set your alarm for 3-4 am and go to an outlying hospital. Our heath care system is circling the drain...