Digital BW, The Print

I hear a lot of numbers being thrown around regarding expected 
longevity of many of the papers and inks we discuss here on the list. 
But I for the life of me cannot find this info on Wilhelm's site. It 
seems to have general articles on 4 or 5 Epson printers, then a ton of 
"and here's another magazine that did an interview with me" links.

Don't get me wrong, the testing done by many on this list gives me 
enough confidence that I can at least sell my work without worry. But I 
would like to be able to point my clients toward a site like Wilhelm's 
for reassurance and an "official" longevity guesstimate, as it's 
obvious that a lot of media outlets consider him an authority on the 
subject. I know we all have mixed feelings on that, but if you sell you 
can understand the need is there.

Anybody able to point me to the actual paper/ink longevity claims on 
Wilhelm's or some other testing "authority"?

TIA,
Doug