Actually the 50+ crowd is probably the largest demographic of ebikes, but my gut tells me they generally prefer PAS/pedelec systems, and sticking to bike trails and less busy roads. They will be the easiest demographic to sway. They also have the financial means to buy what they want for the most part.
The commuting crowd is definitely the harder nut to crack, especially those commuters nestled safely in their steel cages. - However, if electric bikes could be viewed similarly to motorcycles, I think we could gain a respectable following. Being able to keep up with traffic and also to creatively and legally avoid it, when the opportunity presents itself is key.
Urban sprawl is another factor to consider. While many commuters would never consider riding a standard bicycle 20 miles each way to work, with an electric bicycle, this feat becomes much more manageable. - In some instances, the commute may be shorter on an ebike than in a car. - For this group, cost is crucial.
The Primary demographic I am trying to hit is the performance market - Dirt Bike riders, Thrill seekers. People who really enjoy the feel of acceleration, power and speed. - This Demographic seems pretty small at the moment, and heavily concentrated on Endless-Sphere. I hope to grow this demographic substantially, as they are our most vocal supporters.