>
...
There are claims that the new dye inks are as stable as archival pigment inks. I am very skeptical ...
Yes, I would be skeptical also. The latest generation of dyes from the OEMs in their higher end printers (not the Eco Tank) are very good for dyes and arguably better than some third party color pigments, but in my fade testing they are not in the same league with carbon pigments. At http://www.paulroark.com/BW-Info/2nd-8wk-Fade-test-7-26-2015.jpg you'll see a scan of my last test, where I compared the Canon dye K to the Epson Claria/Noritsu K. The Canon is in the second row from the left, in the middle. The "control" is the dark storage test strip; the other one is the faded one. While the Canon may initially look better than the Epson, probably because the Canon started as warm, while the Epson went from cool/neutral to warm, you can pull that Jpeg into Photoshop and look at the relative fade with the eyedropper. The Canon did not, in my view, do better. Both of the dyes look awful compared to the Eboni BO test that is right below the Canon and ran for twice as long.
Paul