Truth is, I doubt Ferriss is an altruist - but having skimmed through the book at CostCo it's certainly not the worst diet book out there. It's clearly hyped - 4 hour body is selling the belief that with this program it will be easy to lose weight! Look at the full title... "An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman"
However, he is promoting several practices that we've seen on the forums here - not 'banning' food, getting plenty of protein, fewer processed foods (i.e. cut out the 'white' foods), high fiber foods that also have decent protein like beans & lentils... He also has all of the exercise stuff... that I admit didn't impress me much. It certainly did not seem to be 'Uncommon' in terms of diet books, although perhaps it's uncommon in practice.
Now, like many diets he goes for the no calorie counting - it's a big draw for many, and it also explains some of the other tenets of the diet that I don't necessarily agree with, but seem directly targeted at calorie reduction. The no fruit is one - no calorie counting, no limits, fruit could be an easy place to add calories. There's no reason that an apple is any worse than eating a sweet potato, but restricting food choices = restricting calories. Eating the same meals all the time also restricts calories - there have been numerous studies that show that we eat more when we have varied options. If you eat the same few meals over and over you'll eat less naturally.
From my brief glance, this did seem to demonize insulin a bit - which I don't think is really justified. Insulin is an easy scapegoat, even for people who aren't insulin resistant - but cut out 'white' foods and not only are you knocking out a large group of foods (calorie reduction) you're also knocking out a group of very calorically
dense foods (leading to even more calorie reduction). For whatever reason it sounds much sexier - and more compelling - to say "Don't eat these foods because they cause insulin spikes which leads to fat retention" than to say "If you skip eating these foods, you'll end up with fewer calories in a day and eat less overall." The whole horror story about drinking orange juice before bed, and his cholesterol ratings spiking etc... not only is that the worst of anecdotal evidence, it's also using fruit
juice as support for vilifying fruit and fructose entirely rather than say... drinking a really big glass of orange juice.
Please note - this is not me saying that if you're on the diet and seeing success you should drop it because it sucks donkey balls

I myself was on Atkins for 5 years, and feel it was a good decision - there might have been better decisions, but it was still a step up from where I was! I don't think the Four Hour Body is quite what it's hyped up to be, but aside from the 'same foods all the time' possibly having implications of vitamin deficiency, it seems a lot saner than many of the diets I've seen.