The point, I suppose, is that there is still reason to doubt that. As when you move up the money ladder to more expensive receivers or amps -- you might get more "audiophile grade components" (as the marketing departments like to call it), but then you're still not sure if your $1500 receiver sounds all that different from the $500 receiver you had.
Axiom doesn't have "lines" of different speaker products. (At least, not until very recently.) They use the drivers they do because they don't think a fancier driver will make their speakers sound better -- and so they're not making us pay for it. Now, perhaps they're wrong. I don't know nearly enough about building speakers to argue one way or the other.
But, then, that's true for a good many folks wandering these boards, though some might be less willing to admit it. Thankfully, we still have our common sense and our own ears. We could always listen to a speaker, from Axiom or any other company out there, and if we don't like it -- or if we don't think it's worth the asking price -- we move on.
If you're wondering: I've had Axiom M22s since 2004 and, especially considering what they cost me, I've been pretty damn happy with them. Next year or the one after that, I'm looking forward to listening to some of those nice fancy drivers Dynaudio, or KEF, or Revel use. And after I've bought them, I'll tell myself that the difference is "night and day." But, hopefully,
you'll know better.