Perhaps you should deploy an alternate version, and meassure conversion rates? ;-)

Seriously, I think you make a great point of selling your service. I also think you gloss over things like cyclic variations -- but I'm not sure it's your job to educate people in the subtle art of fact oriented market research (or what one should call it).

For those that don't have the time to learn, changing it probably wouldn't matter. For those that do -- chances are they probably will find it out from a more comprehensive resource (like, say, a good book).