Mike
The type of text i think your talking about is the education copy. what this seeks to do is "people dont know what they dont know"
it can be done it two ways one is the direct response method where you put an irresistible offer with a expiry day (pink flyer). or it can used as a way to filter out types of people. JP consumer guide is a great example.
By educating people on stuff they should know will separate yourself from price hunter and carpet cleaners that just market on price. when you just use price that is the only thing your giving prospect to judge you on, I like the way it was explained to me. That if your chatting up a girl you dont expect the best outcome with just a one liner. far more effective to talk them into that perfect outcome
what really interesting about the consumers guide is that it was designed to save people money on advertising. to pay for all that text on any media would cost loads but just using the bullet points you drive them to a recorded message, which people liked because no salesman. or a web page when the cost of that next is next to zero. this works with leaflets as well.
we use a riso to print our leaflets and fold to booklet which is a great looking format for lots of text, looks like a mini newsletter. riso's are a great investment for leaflets, its what printers use anyway. plus you can pick them up for just a couple hundred on ebay, if you get one thats been in a church or low use environment they print perfect, stay away from ones that have been used in a printers. it save you loads on printing. All the FT guys had these for their pink flyers along side a folding machine to fold the a3
Respects
Ian Harper