If you ever go to a KEF Blade demo, one thing they so is to put quarter on edge and balance it on top of the speaker. Then they crank some tunes real loud. The quarter does not move and stays balanced on its edge. Love the Blade.
I got a demo today and ordered a pair.  Will shootout with my current ls50s when I get them.  
I do think Guttenberg May have gotten the frequency range absorbed wrong in his video.

Still a lot of what goes into detail happens at higher frequencies (overtones) and the new technology is said to offer 90%+ absorption compared to only 60% before and the cabinets on all ls50s are very robust.

For now I will just say the demo was very impressive and leave it at that.

And, Guttenberg mentioned the internal bracing is improved in the Meta. It's going to be interesting to see if they measure differently than the original, assuming John Atkinson gets a pair (he loves the original).

I love the matte finish on the Meta, too.

Having heard both now in totally different setups I can say I do think the claims of the new meta’s sounding clearly different from old are likely true but still hard to say. 

Neither is a slouch by any means. 

I started a separate thread that I will post to with my observations regarding the two once the metas arrive. That will be more apples and apples. Stay tuned.