That's my experience too, though we have on a couple of occasions had to glue a little sliver of bone to move the nut contact point (there has got to be a better way of saying that) to satisfy a particularly particular customer. The guitar was perfect, but just a few notes on either the G or B string (on and electric or acoustic respectively - I'm sure you can figure that part out) were enough out of tune to drive him nuts. Now, this guy is a regular customer (as in, we see him at least once a week, usually more) who is also one of the best damn players I've ever heard, and has ears better than anyone I know, and can feel changes that are almost impossible to detect - but he really isn't just imagining it, it's real. He's kind of amazing. Actually, he's a lot amazing.
So, our shop manager spent weeks trying to make him happy. But the damn thing just would get those notes in tune. And as I said, the customer wasn't imagining it - the strobe read them as off. Then we tried gluing on a tiny little piece of bone onto the nut to move the contact point about .010"-.020" closer to the 1st fret. And all of a sudden, those notes worked.
So, while I think the one-size-fits-all approach of the Earvana nut, or the Buzz Feiten "system" are snake oil, the concept isn't completely without merit. It just needs to be dealt with on more of a case by case basis.
By the way, Muttley and VP, could you guys please start a seperate thread for your pissing contests? Or better yet, VP, why don't you just shut the fuck up? Seriously, every experienced player on the board has recognized you for a poser, and every time you post your disinformation we will make sure to point out to all the less experienced folks that you are an idiot. Why do you even bother?
That said, Muttley, could you stop feeding the troll?
Light
"Cowards can never be moral."
M.K. Gandhi