I'm currently a PGCE student, so can't give a long term perspective, but I moved between placement schools recently and based on a very small sample of schools I've been in over the last two years I do think it depends a lot on the school.
The school I'm in now is by far the best on paper but the behaviour is by far the worst. The school doesn't have a coherent behaviour policy, or a visible SLT presence, and some students take advantage of this to really push boundaries. I'm told (e.g. by my uni tutor) that it's not a "bad" school because kids throw things around the classroom, but not at me. However, in some classes there are 4-5 individuals who systematically try to prevent any learning from happening and are outright defiant when challenged.
In my last placement, expectations were much clearer. If I asked a child to move due to poor behaviour, they might argue a bit but they moved. I never had a student refuse to leave the room when asked, or fail to show up for a detention, because they knew the consequences of this and were afraid of them. The school had apparently been transformed in the last 5 years by a determined head with a decent behaviour policy (not RTL).
The students in my current placement school have a sense of entitlement and no real fear of anything- which makes some of them almost impossible to manage. And some members of SLT seem to think "it's like this everywhere".
So in my inexperienced opinion, I think a lot is down to the school, and if the school have got it right then it's entirely possible behaviour is better!