Tristan,
It all depends really on the nature of the call. We usually are the first responders (ALS) to medical calls. If it is a MVC, we usually have to maneuver around pickup trucks with more LED lights than our ambulance to get to the scene . DOA, for some reason, PD always beats us there, which in reality is a good thing because they can wait for the coroner. If it's a fire, the hose monkeys beat us there and rightfully so. We are just stand-by.
So you see, it all depends on the call who is first on scene.
BTW, welcome to Emt City.