Get Out of Your Comfort Zone
To the OSR publishers, I say, don’t limit your target audience by only taking one approach. If all you say about your game is “it’s almost exactly like the LBB’s, but easier to understand”, or “plays just like AD&D back in the early 80’s”, you will necessarily limit your audience. A thousand times moreso if your game is almost only mentioned on OSR blogs, Dragonsfoot, and the Knights & Knaves Alehouse.
Branch out! Explain why your game is a good game without any reference to its pedigree whatsoever. Go forth into the fora frequented by the under-26 set, and make the case why your game is great and they should play it, on its own merits! EnWorld, conventions, IPR, fan forums (for those doing games in a particular genre or with a licensed property); anywhere the gamers are, you should be.
I think you’ll find that you get some new blood playing and talking about your game, and I think that being a Good Thing is something we can all agree on.