I like it, but I doubt that's going to come as a great surprise to anyone.
Actually, it gives me some thinking to do about my own past training and such...things I'd abandoned, and things I've kept on with.
In any case: The short answer is, I agree with JAK. Quite a bit. How anyone will ever determine the "authenticity" of an art is beyond me.
Actually, the whole "older is better" theory that is prevelant in many martial arts circles mystifies me too. Yes, a Model T is the original car, but I like my Geo Prizim, thank you! (You're welcome to question how much of an improvement my Geo really is...:-D)
As for mastery? I personally find it a wholly useless concept. No of the great "masters" ever referred to themselves as such. Until I can get a concrete definition for what consitutes a master, I fail to see the purpose in seeking it...