In my opinion info type leaflets do not work as well as they should, the 'long advert' is very American and I think people are now associating them with spam emails. But at least you're doing something!
Direct, straight to the point, bullet points have and always will be the best way to market. If people want to read more then we have the advantage these days of directing them to a website.
Maybe it's just about being in the right place at the right time and my leaflets would have got the same or better response if they were just two lines long saying "Carpet Cleaner Needs Work, Pleeeze fone me now or my kids will starve".