It's more visible to those of us live a lot of time on line, but when I interract with people that are outside the lifestyle community and not a web junkie, it actually seems as if just as many of them are in the dark about this world as there ever was before.
I think there are just as many Dominants as subs, but I think the issue is a Dominant doesn't NEED a sub (but finds the right sub a pleasant addition to their life), but a sub feels incomplete with out a Dominant... so you see where the laws of supply and demand are stacked.