Well from recent experience, there was a fairly short wait time posted each time we went, generally less than 10-15 minutes. There is a huge BUT though. That is wait time for triage by a nurse or nurse practitioner unless you are literally dying or come in via ambulance.
When I went in with the kidney infection and back pain so severe I could hardly walk, and couldn't stop moaning because it hurt so bad (worse than labor with no drugs), it was almost an hour before I saw an actual doctor, and over 3 hours before I got pain medication. I will say the ER was nearly full and they apparently had to call in staff to have enough help to get people treated. I was in a room a little over 5 hours after getting there. I got a private room and a telemetry monitor because the pain, fever and infection put me into A-fib, which self corrected after pain control, a couple of antibiotic doses and the fever broke. I never sweat so much in my life. The telemetry pads kept falling off because I was literally dripping with sweat for several hours.
When Craig went in with the kidney stones about 2 weeks earlier, he had been triaged and had seen a doc in the triage area fairly quickly, but was still in waiting room when I got back from running a business errand over 2 hours later. He was called back shortly after I got there and got morphine within 30 minutes. Then, he laid in the bed in the ER sleeping for several hours until it started to wear off. I already knew he was staying by then, but he still hadn't been assigned a room over 7 hours later, so I went home since he was awake enough to know what was going on, and they had given him some more pain medication but not as strong as morphine.