Digital BW, The Print

Last eveing I was speaking with another photographer by telepone. He 
told me that in California Huntington Witheral is ready to give up on 
Piezo because his display prints are losing 2 stops of density after 
just 60 days on display.

Supposedly he has spoken with Jon Cone and Cone told him it was his 
paper. So he has tried numerous papers and has not been able to keep 
the prints from losing density (fading).

Has anyone else measured the actualy loss in density of Piezo prints?

MIke