Well, folks... the much hyped new baryta papers fall a little short.  Now, maybe with the Epson 3800 it's different, and we'll be running that comparison this week, but the claims that these papers exceed the gamut of AdobeRGB 1998?  I'm not seeing it. 
 

The first bit of this is Epson Premium Luster in green, and Harman Gloss FBAL in red for the Epson R2400.  After a bit, I switched the Luster to "real color" showing which part of the actual gamut we're looking at. 

OK, now THIS is interesting...  Here's AdobeRGB 1998 with Epson Premium Luster- you can see that even this modest combination exceeds the bounds of AdobeRGB.  Now I'm toggling the Harman/3800 combination on and off- bigger, yes, and especialy in the yellow and blue areas, and notably outside of the AdobeRGB gamut.

Who woulda thunk it?

Oh, did I mention how annoying it is to have to create a user name and log in to the Harman site to get at the profiles?