My impression is that Atkins diet restricts carbohydrates - but not
fat or protein. So people eat more fat and protein to make up
for the lack of carbohydrates.

Well, that is that funny thing about low-carb diet - there is no lack of
carbohydrates. Carbohydrates generally have opposite effect to satiety -
they make you more hungry, at least in longer term. Add too that
hunger-control effects of ketosis - and you have low-calorie diet.
Sometimes, when temporarily out of it, I believe I can even feel the
moment when ketosis kicks in again - I start feeling little bit hungry
(low blood sugar), then I feel little bit strange for a minute or two
and suddenly hunger is away and I feel a boost of energy (body starts to
converting fat to glucose and ketones). Of course, could be just my
imagination

Believe, after 4 months on LC, I have actually to watch my protein
intake not be too LOW (I aim to 1g/kg).

The Atkins diet appears to be a bad one :-| People should be
encouraged
to eat more fruit and vegetables - not to replace them with animal
fat.

Yes, and there is another strange effect of low-carb diet - once you cut
out high-carb stuff, you will likely eat much more vegetables - it is
like high-carb affects your eating habits in two bad directions - you
eat too much and you do not have room for veggies, as high-carb stuff
takes their place.

Mirek