I can see both sides of the coin here ladies and I think some people might be jumping on this a bit too quickly and harshly.
I totally agree that a newborn should be fed on demand and that complaining about a week of only getting 3-4 hours of sleep a night when you're new parents is totally absurd!
However, the stretching out time between feeds is actually nothing new; the baby whisperer suggests doing this at 4 months old and many parents try to get their babies into a 3/4 hour rountine and it works well for them. (Obviously this is usually for babies of over 3/4 months old).
Also, the quote about crying being a form of communication is a fair point I think (again not talking about babies only weeks old) as I know parents who feed their babies every time they cry and I have personally witnessed little babies who are so obviously overtired being given a bottle and 'fed to sleep' which really only creates problems, including digestive issues and sleep associations, plus overfeeding can be problematic for ff babies.
Plus, at no point did it say that they advise leaving your newborn screaming for hours at night. In fact, the way I interpreted it was that the baby would hopefully naturally go longer at night by gradually stretching the feeds by 15 minutes each day (I personally think this is too quick and not gradually enough) but they don't report on what to do in the night.
Anyway, my point is that until I've read the book, I won't be judging the Jassey brothers too harshly as the information in the acrticle is written by a journalist and is extremely limited. Has anyone actually read the book?!