I don't buy it. Can you show me some statistics to prove that this (junk mail) works? I have always thought of junk mail as a last ditch effort. You have no other means to reach your customer, so you do the "throw it against the wall and see what sticks" approach.
After all this, a particular company will know exactly the demographic that buys, exactly the headline that grabs attention, the copy that gets people to keep turning the page, the post-script message that increases conversions, etc.
This kind of marketing has been perfected, as the author says. A good direct-mail marketer will get a conversion rate of 5%-10%. There are some books you can read to get at specific numbers of different campaigns... This is one of them http://www.amazon.com/Getting-Everything-You-Can-Youve/dp/03....