Rhodysail, by "readers" of catsailor.com, I assume you are referring to the people who frequent the forums on catsailor.com.
The forum users seem to be more high-tech oriented and more into Portsmouth racing, whereas my magazine readers are a much more diverse group. There does not seem to be a whole lot of overlap between the two groups. I'll bet most of my magazine subscribers have never even seen the catsailor.com forum, and I'll bet most of the catsailor.com forum users do not subscribe to my magazine.
I haven't done a survey through Catamaran Sailor for about five years. It is definitely time to do another one, but I just haven't had time to put it together. I like to do surveys in the winter when people have a lot of time on their hands to think instead of sail.