I'm just using the common parlance that other people often use, and have been using on this thread; I wouldn't choose that description myself, as I believe that what is called 'gentle parenting' is in fact normal parenting.
That said, 'normal parenting' will cover a wide spectrum. In fact, there probably isn't a way of quantifying 'normal parenting' in the first place. I know a number of families which I would consider to be decent, caring, responsible families - some of them middle class (we aren't MC ourselves) - but where they do shout a lot, rather than talking calmly to the children.
Maybe 'screaming' was an exaggeration, when I mostly meant shouting or just generally very loud (the parents as well as the children); and also I possibly should have said 'calm and quiet' rather than gentle... but then again, the same terms will mean very different things to different people, and many might say that those are just synonyms for 'gentle'.
For the record, I don't personally really like the phrase 'gentle parenting', as it's usually used dismissively and can be understood in a wide range of ways.
We have always spoken to our DS calmly in an age-appropriate way, but not letting him get away with bad behaviour. As I said before, we've probably been lucky as he's always been a generally well-behaved and responsible child, now the same as a teenager. We would almost certainly be criticised by the people who say "You shouldn't be your children's friend; you're their parent" - but it's worked very well for us by being both. We now have a very calm, mutually-respectful relationship; but he still knows that we are in charge.