Just this.
I live in a yummy mummy part of the UK where gentle parenting is all the rage. Where the parents have kids who are, shall we say, spirited, it seems the result is kids who turn into utter monsters with no sense of boundaries and terrorize their parents.
I also have friends who gentle parent and their kids are delightful and sweet. Though those kids are the ones that even in baby groups would be sat, listening nicely, playing with a toy. I'm going to say 'compliant kids'.
Maybe this is because gentle parenting is based on a lot of talking, so you need kids with a reasonably developed sense of listening, patience and understanding to really apply it, and with some kids that doesn't develop until older.
Interested whether it's just me who has noticed this - and indeed if anyone has successfully managed to do a full Ockwell-Smith on a spirited / not naturally compliant child and can prove me wrong!