FWIW, I A/B tested a "long" sales letter with a cleaner, shorter and nicer looking one (imo) for my info product targeted at programmers.

Long: http://createyourproglang.com/index2.html Short: http://createyourproglang.com/

I've let the experiment run for a few months and the results were never concluding, ~50% each the whole time.

My guess is that most of my buyers are pre-sold by affiliates, or via word of mouth, and don't read anything. Any other interpretation greatly appreciated.