Adding in my tuppence worth. Which is just my opinion.
Moderation to me is different to repeatedly bending and breaking the post op rules. Moderation is normal, and acceptable, and should eventually become a way of life for people. On the flipside, there are members here who frequently break the rules and eat stuff they really shouldn't, and even some who seem to revel in it and gloat about it.
On one side, there is the carb and trash trap, where in the first 4 months you can 'get away' with breaking some food rules and still lose weight. By nature, most people will easily fall into this, and it depends then on your will power and how knowledgable you are as to the eating required post op, the reasoning behind it, and the pitfalls to avoid. What we see happening is post-oppers in this trap reaching 4-6 months and hitting long stalls, and negligable losses. Not always, there are a few who struggle at this stage regardless of what they eat, but they are few and far between.
Secondly, the journey to surgery makes a huge difference, and this is where many private patients come unstuck. It is my opinion, that unless there is a medical urgency for the surgery, then it should be a long journey to get it. All patients should have to go through a decent lifestyle and weight management course, and a proper and thorough psychological assessment as to suitability for surgery prior to funding being granted. It took me nearly 2 years to get funding and it did me the world of good, as in that time I was re-educated, dealt with the majority of my food demons, and received psychological support for dealing with the surgery, which I can still access now should I need it. I get extremely frustrated when I see posts saying 'I've got to do 6 months weight management, how can I bypass this?'! I thought I knew everything about nutrition, balanced meals etc, but I learned a lot and benefited hugely from my 12 months of it. I have seen more private patients than NHS patients come unstuck due to psychological problems and lack of coping mechanisms, due to the rapid route to surgery and the lack of emotional and psychological support.
In an ideal world, there would be a standardised criteria, a standardised referral pathway, and a standardised level of post operative care for all. However, that is a long way off and at times seems like a pipe dream, so for now many patients can only rely on sites like this for their support, education and guidance, which is why the non-judgemental element of this forum is so crucial.